Form 10-Q - Quarterly report [Sections 13 or 15(d)]

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 10-Q

(Mark One)

☒	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2024

☐	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from _________________ to _________________

Commission File Number: 001-39696

COMPASS THERAPEUTICS, INC.

(Exact Name of Registrant as Specified in its Charter)

Delaware	82-4876496
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

80 Guest St., Suite 601 Boston, Massachusetts	02135
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (617) 500-8099

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading

Symbol(s)

Name of each exchange on which registered

Common Stock, $0.0001 par value per share

CMPX

Nasdaq Capital Market

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☐	Accelerated filer	☐

Non-accelerated filer	☒	Smaller reporting company	☒

		Emerging growth company	☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

As of August 8, 2024, the registrant had 137,589,171 shares of common stock, $0.0001 par value per share, outstanding.

Auditor Firm Id: 596

Auditor Name: CohnReznick LLP

Auditor Location: Melville, NY U.S.A.

Table of Contents

		Page
PART I.	FINANCIAL INFORMATION	1
Item 1.	Financial Statements (Unaudited)	1
	Condensed Consolidated Balance Sheets (Unaudited)	1
	Condensed Consolidated Statements of Operations (Unaudited)	2
	Condensed Consolidated Statements of Stockholders’ Equity (Unaudited)	3
	Condensed Consolidated Statements of Cash Flows (Unaudited)	4
	Notes to Unaudited Condensed Consolidated Financial Statements	5
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	12
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	21
Item 4.	Controls and Procedures	21
PART II.	OTHER INFORMATION	22
Item 1.	Legal Proceedings	22
Item 1A.	Risk Factors	22
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	23
Item 3.	Defaults Upon Senior Securities	23
Item 4.	Mine Safety Disclosures	23
Item 5.	Other Information	23
Item 6.	Exhibits	23
Signatures		24

PART I—FINANCIAL INFORMATION

Item 1. Financial Statements

Compass Therapeutics, Inc. and Subsidiaries

Condensed Consolidated Balance Sheets

(In thousands, except par value)

	June 30, 2024 (unaudited)			December 31, 2023 (Note 1)
Assets
Current assets:
Cash and cash equivalents	$	19,404		$	24,228
Marketable securities		126,823			128,233
Prepaid expenses and other current assets		7,319			1,420
Total current assets		153,546			153,881
Property and equipment, net		592			898
Operating lease, right-of-use ("ROU") asset		1,153			1,776
Other assets		320			320
Total assets	$	155,611		$	156,875
Liabilities and Stockholders' Equity
Current liabilities:
Accounts payable	$	1,192		$	4,090
Accrued expenses		7,227			2,514
Operating lease obligations, current portion		1,088			1,197
Total current liabilities		9,507			7,801
Operating lease obligations, long-term portion		—			536
Total liabilities		9,507			8,337
Commitments and contingencies (Note 7)
Stockholders' equity:
Common stock, $0.0001 par value: 300,000 shares authorized; 137,589 and 127,668 shares issued and outstanding at June 30, 2024 and December 31, 2023, respectively		14			13
Additional paid-in-capital		485,352			463,796
Accumulated other comprehensive (loss) income		(91	)		37
Accumulated deficit		(339,171	)		(315,308	)
Total stockholders' equity		146,104			148,538
Total liabilities and stockholders' equity	$	155,611		$	156,875

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

Compass Therapeutics, Inc. and Subsidiaries

Condensed Consolidated Statements of Operations and Comprehensive Loss

(Unaudited)

(In thousands, except per share data)

	Three Months Ended June 30,						Six Months Ended June 30,
	2024			2023			2024			2023
Licensing revenue	$	850		$	—		$	850		$	—
Operating expenses:
Research and development	$	11,174		$	10,223		$	20,695		$	16,862
General and administrative		4,721			3,114			7,969			6,183
Total operating expenses		15,895			13,337			28,664			23,045
Loss from operations		(15,045	)		(13,337	)		(27,814	)		(23,045	)
Other income		1,969			2,059			3,951			3,930
Loss before income tax expense		(13,076	)		(11,278	)		(23,863	)		(19,115	)
Income tax expense		—			—			—			—
Net loss	$	(13,076	)	$	(11,278	)	$	(23,863	)	$	(19,115	)
Net loss per share - basic and diluted	$	(0.10	)	$	(0.09	)	$	(0.17	)	$	(0.15	)
Basic and diluted weighted average shares outstanding		137,589			126,729			137,098			126,539
Other comprehensive loss:
Net loss	$	(13,076	)	$	(11,278	)	$	(23,863	)	$	(19,115	)
Unrealized loss on marketable securities		(1	)		(361	)		(128	)		(205	)
Comprehensive loss	$	(13,077	)	$	(11,639	)	$	(23,991	)	$	(19,320	)

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

Compass Therapeutics, Inc. and Subsidiaries

Condensed Consolidated Statements of Stockholders’ Equity

(Unaudited)

(In thousands)

	Common Stock				Additional Paid-in			Accumulated Other Comprehensive			Accumulated			Total Stockholders'
	Shares		Amount		Capital			(Loss) Income			Deficit			Equity
Balance at December 31, 2023		127,668	$	13	$	463,796		$	37		$	(315,308	)	$	148,538
Common shares issued, net of issuance costs of $0.5 million		9,790		1		17,568			—			—			17,569
Share-based awards, net of tax remittance		131				(136	)		—			—			(136	)
Stock-based compensation		—		—		2,003			—			—			2,003
Unrealized loss on marketable securities		—		—		—			(127	)		—			(127	)
Net loss		—		—		—			—			(10,787	)		(10,787	)
Balance at March 31, 2024		137,589		14		483,231			(90	)		(326,095	)		157,060
Stock-based compensation		—		—		2,121			—			—			2,121
Unrealized loss on marketable securities		—		—		—			(1	)		—			(1	)
Net loss		—		—		—			—			(13,076	)		(13,076	)
Balance at June 30, 2024		137,589	$	14	$	485,352		$	(91	)	$	(339,171	)	$	146,104

Balance at December 31, 2022		126,302	$	13	$	454,741		$	(302	)	$	(272,814	)	$	181,638
Vesting of share-based awards		61		—		—			—			—			—
Stock-based compensation		—		—		1,267			—			—			1,267
Common stock issued upon exercise of options		12		—		41			—			—			41
Unrealized gain on marketable securities		—		—		—			156			—			156
Net loss		—		—		—			—			(7,837	)		(7,837	)
Balance at March 31, 2023		126,375		13		456,049			(146	)		(280,651	)		175,265
Common shares issued, net of issuance costs of $0.1 million		952		—		3,032			—			—			3,032
Vesting of share-based awards		61		—		—			—			—			—
Stock-based compensation		—		—		1,628			—			—			1,628
Unrealized loss on marketable securities		—		—		—			(361	)		—			(361	)
Net loss		—		—		—			—			(11,278	)		(11,278	)
Balance at June 30, 2023		127,388	$	13	$	460,709		$	(507	)	$	(291,929	)	$	168,286

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

Compass Therapeutics, Inc. and Subsidiaries

Condensed Consolidated Statements of Cash Flows

(Unaudited)

(In thousands)

	For the Six Months Ended June 30,
	2024			2023
Cash flows from operating activities:
Net loss	$	(23,863	)	$	(19,115	)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization		306			374
Share-based compensation		4,124			2,895
Amortization of premium and discount on marketable securities		(1,103	)		(1,628	)
ROU asset amortization		623			582
Changes in operating assets and liabilities:
Prepaid expenses and other current assets		(5,899	)		1,662
Accounts payable		(2,898	)		(2,658	)
Accrued expenses		4,713			(3,863	)
Operating lease liability		(645	)		(591	)
Net cash used in operating activities		(24,642	)		(22,342	)
Cash flows from investing activities:
Purchases of marketable securities		(72,950	)		(92,964	)
Proceeds from sale or maturities of marketable securities		75,334			96,577
Purchases of property and equipment		—			(11	)
Net cash provided by investing activities		2,384			3,602
Cash flows from financing activities:
Proceeds from issuance of common stock		18,113			3,126
Issuance costs from issuance of common stock		(543	)		(95	)
Taxes paid related to net shares settlement of RSUs		(136	)		—
Proceeds from exercise of stock options		—			41
Net cash provided by financing activities		17,434			3,072
Net change in cash and cash equivalents		(4,824	)		(15,668	)
Cash and cash equivalents at beginning of period		24,228			34,946
Cash and cash equivalents at end of period	$	19,404		$	19,278
Supplemental disclosure of cash flow information
Unrealized loss on marketable securities	$	(128	)	$	(205	)

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

Compass Therapeutics, Inc. and Subsidiaries

Notes to Unaudited Condensed Consolidated Financial Statements

1.	Nature of Business and Basis of Presentation

Compass Therapeutics, Inc. (“Compass” or the “Company”) is a clinical-stage, oncology-focused biopharmaceutical company developing proprietary antibody-based therapeutics to treat multiple human diseases. Our scientific focus is on the relationship between angiogenesis and the immune system. Our pipeline includes novel product candidates that leverage our understanding of the tumor microenvironment, including both angiogenesis-targeted agents and immune-oncology focused agents. These product candidates are designed to optimize critical components required for an effective anti-tumor response to cancer. These include modulation of the microvasculature via angiogenesis-targeted agents; induction of a potent immune response via activators on effector cells in the tumor microenvironment; and alleviation of immunosuppressive mechanisms used by tumors to evade immune surveillance. We plan to advance our product candidates through clinical development as both standalone therapies and in combination with our proprietary drug candidates as long as their continued development is supported by clinical and nonclinical data. References to Compass or the Company herein include Compass Therapeutics, Inc. and its wholly-owned subsidiaries.

The Company is subject to risks and uncertainties common to companies in the biotechnology and pharmaceutical industries. There can be no assurance that the Company’s research and development will be successfully completed, that adequate protection for the Company’s technology will be obtained, that any products developed will obtain necessary government regulatory approval or that any approved products will be commercially viable. The Company operates in an environment of rapid change in technology and substantial competition from pharmaceutical and biotechnology companies. In addition, the Company is dependent upon the services of its employees and consultants.

In the opinion of management, the accompanying unaudited condensed consolidated financial statements include all normal and recurring adjustments (which consist primarily of accruals, estimates and assumptions that impact the financial statements) considered necessary to present fairly the Company’s consolidated financial position as of June 30, 2024 and its consolidated results of operations, comprehensive loss and changes in stockholders’ equity for the three and six months ended June 30, 2024 and 2023 and cash flows for the six months ended June 30, 2024 and 2023. Operating results for the six months ended June 30, 2024 are not necessarily indicative of the results that may be expected for the year ending December 31, 2024.

The unaudited condensed consolidated financial statements include the accounts of Compass Therapeutics, Inc. and its subsidiaries, and have been prepared by the Company in conformity with accounting principles generally accepted in the United States of America (“GAAP”) and pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) for interim financial statements. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. The condensed consolidated balance sheet at December 31, 2023 has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by GAAP for complete financial statements. Accordingly, these condensed consolidated financial statements should be read in conjunction with the Company’s audited financial statements in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2023 (the “Annual Report”).

Liquidity

Since our inception, we have devoted substantially all of our efforts to organizing and staffing our Company, business planning, raising capital, research and development activities, building our intellectual property portfolio and providing general and administrative support for these operations. We have funded our operations with proceeds from the sale of our equity securities and borrowing from debt arrangements. Through June 30, 2024, we have received $430 million in gross proceeds from the sale of equity securities. As of June 30, 2024, we had cash, cash equivalents and marketable securities of $146 million. Based on our research and development plans, we expect that such cash resources will enable us to fund our operating expenses and capital expenditure requirements into the first quarter of 2027.

2.	Summary of Significant Accounting Policies

There have been no material changes to the significant accounting policies previously disclosed in the Company’s Annual Report.

3.	Fair Value Measurements

The following tables represent the Company’s financial assets that are measured at fair value on a recurring basis and indicate the level of the fair value hierarchy utilized to determine such fair values (in thousands):

	Fair Value Measurements as of June 30, 2024 (000's):
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value
Assets
Corporate bonds	$	—	$	63,101	$	—	$	63,101
Commercial paper		24,204		—		—		24,204
Certificates of deposit		—		17,076		—		17,076
U.S. government treasuries		12,728		—		—		12,728
Asset-backed securities		—		9,714		—		9,714
Cash equivalents		529		—		—		529
Total assets	$	37,461	$	89,891	$	—	$	127,352

	Fair Value Measurements as of December 31, 2023 (000's):
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value
Assets
Corporate bonds	$	—	$	54,281	$	—	$	54,281
Commercial paper		28,534		—		—		28,534
Certificates of deposit		—		18,866		—		18,866
U.S. government treasuries		16,080		—		—		16,080
Asset-backed securities		—		10,472		—		10,472
Money market funds (cash equivalents)		575		—		—		575
Total assets	$	45,189	$	83,619	$	—	$	128,808

4.	Marketable Securities

The objectives of the Company’s investment policy are to ensure the safety and preservation of invested funds, as well as to maintain liquidity sufficient to meet cash flow requirements. The Company invests its excess cash in securities issued by financial institutions, commercial companies, and government agencies that management believes to be of high credit quality in order to limit the amount of its credit exposure. The Company has not realized any net losses from its investments.

Unrealized gains and losses on investments that are available for sale are recognized in accumulated other comprehensive loss, unless an unrealized loss is considered to be other than temporary, in which case the unrealized loss is charged to operations. The Company periodically reviews its investments for other than temporary declines in fair value below cost basis and whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable.

The Company believes the individual unrealized losses represent temporary declines primarily resulting from interest rate changes. Realized gains and losses are included in other income in the condensed consolidated statements of operations and comprehensive loss and are determined using the specific identification method with transactions recorded on a trade date basis. The Company classifies marketable securities that are available for use in current operations as current assets on the condensed consolidated balance sheet.

The following tables summarize marketable securities held (in thousands):

	Fair Value Measurements as of June 30, 2024 Using:
	Amortized Cost		Unrealized gains		Unrealized Losses			Fair Value
Assets
Corporate bonds	$	63,135	$	43	$	(77	)	$	63,101
Commercial paper		24,217		—		(13	)		24,204
Certificates of deposit		17,068		10		(2	)		17,076
U.S. government treasuries		12,792		—		(64	)		12,728
Asset-backed securities		9,702		14		(2	)		9,714
Total assets	$	126,914	$	67	$	(158	)	$	126,823

	Fair Value Measurements as of December 31, 2023 Using:
	Amortized Cost		Unrealized gains		Unrealized Losses			Fair Value
Assets
Corporate bonds	$	54,256	$	74	$	(49	)	$	54,281
Commercial paper		28,507		30		(3	)		28,534
Certificates of deposit		18,850		17		(1	)		18,866
U.S. government treasuries		16,127		3		(50	)		16,080
Asset-backed securities		10,456		23		(7	)		10,472
Total assets	$	128,196	$	147	$	(110	)	$	128,233

	As of
	June 30, 2024		December 31, 2023
Maturing in one year or less	$	88,752	$	93,117
Maturing after one year through two years		38,071		35,116
Total	$	126,823	$	128,233

5.	Property and Equipment

Property and equipment consist of the following (in thousands):

	June 30, 2024			December 31, 2023
Equipment	$	5,167		$	5,167
Leasehold improvements		1,612			1,612
Software		364			364
Furniture and fixtures		22			22
Total property and equipment–at cost		7,165			7,165
Less: Accumulated depreciation		(6,573	)		(6,267	)
Property and equipment, net	$	592		$	898

Depreciation and amortization expense for the six months ended June 30, 2024 was $0.3 million as compared to $0.4 million for the same period in 2023.

6.	Accrued Expenses

Accrued expenses consist of the following (in thousands):

	June 30,		December 31,
	2024		2023
Project expenses	$	4,605	$	336
Compensation and benefits		2,314		1,938
Other		308		240
Total accrued expenses	$	7,227	$	2,514

Project expenses are from $4.6 million of accrued manufacturing expenses. These expenses are mostly for the manufacture of drug product for CTX-009 including $4.5 million of minimum contractual obligations.

7.	Commitments and Contingencies

Leases

The Company has evaluated its leases under ASC 842, Leases, and determined that it has one lease that is classified as an operating lease. The classification of this lease is consistent with the Company’s determination under the previous accounting standard.

When available, the Company will use the rate implicit in the lease to discount lease payments to present value; however, the Company’s current lease does not provide an implicit rate. Therefore, the Company used its incremental borrowing rate to discount the lease payments based on the date of the lease commencement.

The Company has one operating lease for its corporate office and laboratory facility (“Facility”) that was signed in December 2020. The Company moved into the Facility in January 2021. The Facility lease has an initial term of four years and five months, beginning on January 1, 2021. The Facility lease contains scheduled rent increases over the lease term. The discount rate used for the Facility lease is 6.25%, and the remaining lease term of the Facility lease is eleven months as of June 30, 2024. Cash payments related to the Facility were $0.3 million for the three months ending June 30, 2024 and 2023 and $0.7 million for the six months ending June 30, 2024 and 2023.

The table below presents the undiscounted cash flows for the lease term. The undiscounted cash flows are reconciled to the operating lease liabilities recorded on the condensed consolidated balance sheet (in thousands):

Remainder of 2024	$	575
2025		543
Total minimum lease payments		1,118
Less: amount of lease payments representing interest		(30	)
Present value of future minimum lease payments		1,088
Less: operating lease obligations, current portion		(1,088	)
Operating lease obligations, long-term portion	$	—

Defined Contribution Plan

The Company has a 401(k) defined contribution plan (the “401(k) Plan”) for substantially all its employees. Eligible employees may make pre-tax or post-tax (Roth) contributions to the 401(k) Plan up to statutory limits. Since January 1, 2020, the Company has been matching employee contributions to the plan up to 4% of salary. On July 1, 2023, the Company increased the employee matching contribution from 4% to 6%. The Company made matching contributions of $0.2 million and $0.1 million for the three months ended June 30, 2024 and 2023, respectively. The Company made matching contributions of $0.2 million and $0.1 million for the six months ended June 30, 2024 and 2023, respectively.

8.	Stock-Based Compensation

Stock-based compensation expense for the three and six months ended June 30, 2024 and 2023 was classified in the condensed consolidated statement of operations as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
	(000’s)				(000’s)
Research and development	$	458	$	146	$	1,382	$	229
General and administrative		1,663		1,482		2,742		2,666
Total	$	2,121	$	1,628	$	4,124	$	2,895

As of June 30, 2024, remaining unrecognized stock-based compensation cost from all plans to be recognized in future periods totaled $19.4 million.

2020 Plan

In June 2020, the Company’s board of directors adopted the 2020 Stock Option and Incentive Plan (the “2020 Plan”) and reserved 2.9 million shares of common stock for issuance under this plan. The 2020 Plan includes automatic annual increases. The increase on January 1, 2024 was 5.1 million shares. As of June 30, 2024, 4.5 million shares remain available for grant.

The 2020 Plan authorizes the board of directors or a committee of the board to grant incentive stock options, nonqualified stock options, restricted stock awards and restricted stock units ("RSUs") to eligible officers, employees, consultants and directors of the Company. Options generally vest over a period of four years and have a contractual life of ten years from the date of grant.

Stock Options:

The following table summarizes the stock option activity for the 2020 Plan:

			Weighted		Weighted
	Number of		Average		Average		Aggregate
	Unvested		Exercise		Remaining		Intrinsic
	Options		Price		Contractual		Value
	(000's)		Per Share		Term (in years)		($000's)
Outstanding at December 31, 2023		7,876	$	3.81		8.05	$	11
Granted		3,453	$	1.82		9.55		—
Exercised		—	$	—		—		—
Forfeited/canceled		—	$	—		—		—
Outstanding at June 30, 2024		11,329	$	3.21		8.16	$	—
Vested at June 30, 2024		5,114	$	3.95		7.27	$	—

For the six months ended June 30, 2024, the weighted average grant date fair value for options granted was $1.82. The options had no intrinsic value as of June 30, 2024. As of June 30, 2024, the total unrecognized compensation cost related to outstanding options was $11.4 million, to be recognized over a weighted average period of 1.5 years.

For the six months ended June 30, 2023, the weighted average grant date fair value for options granted was $2.85. The intrinsic value for options vested as of June 30, 2023, was $0.6 million. As of June 30, 2023, the total unrecognized compensation cost related to outstanding options was $11.3 million, to be recognized over a weighted average period of 3 years.

The weighted average assumptions used in the Black-Scholes pricing model to determine the fair value of stock options granted during the six months ended June 30, 2024 and 2023 were as follows:

	Six Months Ended June 30,
	2024			2023
Expected term (in years)		6.0			6.0
Risk-free rate		4.04	%		3.80	%
Expected volatility		80	%		88	%
Expected dividend yield		—			—

As of January 2024, the Company used the historical price of only its own stock to determine the expected volatility. Prior to this, a group of industry peers, including the Company’s stock price, was used.

RSUs:

The following table summarizes the RSU activity for the 2020 Plan:

	Shares (000's)			Weighted Average Price Per Share		Weighted Average Fair Value ($000's)
Unvested, December 31, 2023		1,500		$	3.89	$	5,835
Granted		2,391			1.93		4,615
Vested		(225	)		3.93		(884	)
Forfeited or canceled		—			—		—
Unvested, June 30, 2024		3,666		$	2.61	$	9,565

The weighted average price per share is the weighted grant price based on the closing market price of each of the stock grants. The weighted average fair value is the weighted average share price times the number of shares.
As of June 30, 2024, remaining unrecognized compensation cost related to RSUs to be recognized in future periods totaled $8.0 million, which is expected to be recognized over a weighted average period of 1.8 years.

9.	Related Parties and Related-Party Transactions

There were no material related party transactions during the six months ended June 30, 2024 and 2023.

10.

Other Income

Other income consists exclusively of interest income of $2.0 million and $2.1 million for the three months ended June 30, 2024 and 2023, respectively. Interest income was $4.0 million and $3.9 million for the six months ended June 30, 2024 and 2023, respectively

11.

License, Research and Collaboration Agreements

Collaboration Agreements

ABL Bio Corporation ("ABL Bio") Agreement

In November 2018, the Company and ABL Bio, a South Korean biotechnology company, entered into an exclusive global (excluding South Korea) license agreement which granted the Company a license to CTX-009 (ABL001), ABL Bio’s bispecific antibody targeting DLL4 and VEGF-A. Under the terms of the agreement, the two companies would jointly develop CTX-009, with ABL Bio responsible for development of CTX-009 throughout the end of Phase 1 clinical trials and the Company responsible for the development of CTX-009 from Phase 2 and onward. ABL Bio received a $5 million upfront payment and $6 million development milestone payment. In addition, ABL Bio is eligible to receive up to $96 million of development and regulatory milestone payments, and up to $303 million of commercial milestone payments and tiered single-digit royalties on net sales of CTX-009 in oncology. ABL Bio is also eligible to receive up to $75 million in development and regulatory milestones and up to $110 million in commercial milestone payments and tiered, single-digit royalties on net sales of CTX-009 in ophthalmology.

In May 2021, the Company and ABL Bio terminated license agreements to several preclinical assets. As a result of the return of these assets to ABL Bio and termination of the license agreements, the Company is eligible to receive royalty payments if ABL Bio develops or licenses two bispecific antibodies that were previously licensed to the Company.

Adimab Agreement

The Company entered into a collaboration agreement with Adimab, LLC on October 16, 2014. The agreement includes provisions for payment of royalties at rates ranging in the single digits as a percentage of future net sales within a specified term from the first commercial sale for certain antibodies, including our product candidate, CTX-471. There were no milestone payments made during the first six months of 2024. As of June 30, 2024, future potential milestone payments in connection with this agreement amounted to $2.0 million.

Elpiscience Agreement

The Company entered into a license agreement with Elpiscience Biopharmaceuticals Co., Limited (“Elpiscience”) on January 16, 2021. Under the agreement, the Company granted certain rights, including to develop, manufacture and commercialize CTX-009, to Elpiscience for the territory of Mainland China, Hong Kong, Taiwan and Macau in exchange for royalties and milestones. In April 2024, Elpiscience completed its phase 1 clinical trial which required a $1 million milestone payment due to the Company. Per the ABL Bio Agreement noted in this footnote, sub-licensing revenue is subject to a 15% royalty. License revenue reflects the $1 million, net of the ABL Bio royalty. License revenue is shown net of this royalty.

12.

Stockholders’ Equity

In the quarter ended March 31, 2024, the Company sold through its at-the-market (“ATM”) agreement with Jefferies LLC, 9,790,577 shares of common stock at an average price of $1.85 for total proceeds of $18.1 million and net proceeds of $17.6 million. The Company did not sell shares through the ATM in the quarter ended June 30, 2024.

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

The following discussion of the financial condition and results of operations of Compass Therapeutics, Inc. should be read in conjunction with the financial statements and the notes to those statements included in this Quarterly Report on Form 10-Q for the three and six months ended June 30, 2024. Some of the information contained in this discussion and analysis, including information with respect to our plans and strategy for our business, includes forward-looking statements that involve risk, uncertainties and assumptions. You should read the “Risk Factors” section of this Quarterly Report on Form 10-Q and the “Risk Factors” section included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2023, for a discussion of important factors that could cause actual results to differ materially from the results described in or implied by the forward-looking statements contained in the following discussion and analysis.

Overview

We are a clinical-stage, oncology-focused biopharmaceutical company developing proprietary antibody-based therapeutics to treat multiple human diseases. Our scientific focus is on the relationship between angiogenesis, the immune system, and tumor growth. Our pipeline of novel product candidates is designed to target multiple critical biological pathways required for an effective anti-tumor response. These include modulation of the microvasculature via angiogenesis-targeted agents, induction of a potent immune response via activators on effector cells in the tumor microenvironment, and alleviation of immunosuppressive mechanisms used by tumors to evade immune surveillance. We plan to advance our product candidates through clinical development as both standalone therapies and in combination with proprietary pipeline antibodies based on supportive clinical and nonclinical data.

We currently have three product candidates in the clinical stage of development: CTX-009, CTX-471 and CTX-8371. A summary of these product candidates is presented below. For a more detailed description, see our Annual Report on Form 10-K for the fiscal year ended December 31, 2023.

CTX-009 (a.k.a. ABL001) - anti-DLL4 x VEGF-A bispecific antibody

CTX-009 is an investigational bispecific antibody that is designed to simultaneously block DLL4 and VEGF-A signaling pathways, which are critical to angiogenesis and tumor vascularization. Preclinical and early clinical data of CTX-009 as a monotherapy and in combination with chemotherapy suggest that blockade of both pathways provides robust anti-tumor activity across several solid tumors, including colorectal, gastric, cholangiocarcinoma, pancreatic and non-small cell lung cancer.

CTX-009 is currently undergoing clinical studies as a monotherapy and in combination with chemotherapy in the United States. We currently have two ongoing U.S. clinical trials with CTX-009: a Phase 2 trial of CTX-009 as monotherapy in patients with metastatic colorectal cancer (“CRC”) who received two or three prior treatment regimens and a randomized Phase 2/3 trial of CTX-009 in combination with paclitaxel in patients with biliary tract cancer (“BTC”) who received one prior treatment regimen.

We licensed the exclusive global rights to CTX-009, outside of South Korea, from ABL Bio, Inc. (“ABL Bio”), a South Korea-based clinical-stage company focused on developing antibody therapeutics. South Korean rights are held by Handok Pharmaceuticals, Inc. (“Handok”) and China rights were out-licensed from the Company to Elpiscience Biopharmaceuticals Co., Limited (“Elpiscience”).

Our strategy is to develop CTX-009 in all of the indications in which patients have a need for effective and novel therapeutic agents and data supports the potential therapeutic benefit of CTX-009. We chose BTC and CRC as our lead indications based on a number of factors, including CTX-009 activity observed in the Phase 1, 1b and 2 clinical trials, lack of effective therapies for these patient populations in the targeted lines of therapy and the potential for a straight-forward regulatory route to approval.

We are conducting a Phase 2 monotherapy clinical trial of CTX-009 in patients with metastatic colorectal cancer who have received two or three prior systemic therapies irrespective of their KRAS mutation status. The trial is designed to assess the safety and efficacy of CTX-009 as a monotherapy in patients with colorectal cancer treated in the third and fourth-line settings and utilizes a Simon Two-Stage adaptive design where the criteria to advance to the second stage of the trial is three partial responses observed in 37 patients enrolled in Part A of the trial. Based on the Simon Two-Stage design, if the criteria for the first stage are met, the trial progresses to the second stage. The trial can be found on www.clinicaltrials.gov (identifier NCT 05513742).

The first stage of the trial enrolled 41 patients in the United States, of which 26 (63%) were treated in the fourth line. As of August 2024, preliminary data associated with the first stage of this trial are as follows: overall response rate (“ORR”) of 5% (2 out of 41), the disease control rate (“DCR”) of 71% (29 out of 41), median progression free survival (“PFS”) of 3.9 months and median overall survival (“OS”) is currently 10.2 months. The safety profile was consistent with the prior clinical trials with hypertension as the most common adverse event. Based on this data, we are evaluating a second-line trial in patients with metastatic colorectal cancer combined with chemotherapy whose tumors express DLL4 and we are not going to enroll the second stage of the Phase 2 monotherapy trial.

We are also conducting a randomized Phase 2/3 trial for CTX-009 in combination with paclitaxel in adult patients with unresectable, advanced, metastatic or recurrent biliary tract cancers (“BTC” or “cholangiocarcinoma”) who have received one prior systemic chemotherapy regimen. The trial is designed to assess the safety and efficacy of the combination of CTX-009 and paclitaxel versus paclitaxel alone in patients treated in the second-line settings. The trial is designed to enroll 150 patients, who will be randomized in a 2:1 ratio to receive CTX-009 plus paclitaxel (n=100) or paclitaxel alone (n=50). The primary endpoint of the trial is overall response rate (“ORR”) and the secondary endpoints include PFS, DCR, duration of response (“DOR”) and OS. This trial was fully enrolled in August 2024 and top line data from this study is expected in the first quarter of 2025. The trial can be found on www.clinicaltrials.gov (Identifier NCT 05506943).

In April 2024, the U.S. Food and Drug Administration (FDA) granted Fast Track Designation to CTX-009 in combination with paclitaxel for the treatment of patients with metastatic or locally advanced BTC that have been previously treated.

We intend to explore the potential of CTX-009 in additional indications, based on data from pre-clinical models, potential biomarkers such as DLL4, and clinical data from CTX-009 trials providing signs of potential activity of CTX-009 in additional indications such as ovarian cancer, liver cancer, gastric cancer, pancreatic cancer, renal cell cancer, neuroendocrine cancer and others. We also recently approved the initiation of an Investigator Sponsored Trial (“IST”) for the study of CTX-009 in the first-line setting in patients with BTC to be conducted at the University of Texas MD Anderson Cancer Center.

In addition, we are developing a plan to study the combination of CTX-009 with our novel bispecific checkpoint blocker, CTX-8371, and with other checkpoint blockers, such as pembrolizumab and atezolizumab. Additionally, we are considering the combination of CTX-009 with our novel CD137 agonistic antibody, CTX-471, which is currently in a Phase 1b clinical trial in patients with advanced solid tumors.

CTX-471 - a monoclonal antibody agonist of CD137

CTX-471, our monoclonal antibody product candidate, is a fully human, IgG4 monoclonal antibody that is an agonist of CD137, a key co-stimulatory receptor on immune cells. Binding of CTX-471 to CD137 has been observed to lead to ligand-stimulated activation of T-cells and NK cells. In treated mice, dosing with CTX-471 led to extensive reprogramming of the tumor microenvironment, including increased recruitment of immune cells, reversion of exhausted cytotoxic CD8+ T-cells, reductions in immunosuppressive regulatory T-cells and reductions in immunosuppressive tumor-associated macrophages. Long after the completion of the treatment with CTX-471, a period described as eight half-lives of the antibody, treated mice exhibited immune memory that prevented re-establishment of the same tumor.

The CD137 antigenic site recognized by CTX-471 does not block the binding of CD137 ligand and is differentiated from the site recognized by CD137 antibodies from competitors. We designed the antibody using different backbones and chose to use a human IgG4 backbone for CTX-471 to enable engagement of Fc receptors FcɣRI and FcɣRIIb to facilitate CD137 cross-linking while avoiding binding to FcɣRIIIa and depletion of immune effector cells through ADCC.

Immune cell depletion experiments showed that the activity of CTX-471 required the presence of CD4+ T-cells, CD8+ T-cells, and NK cells, indicating a coordinated involvement of both innate and adaptive immune cells. Encouragingly, treatment of tumors in mice with CTX-471 led to a marked reprogramming of the immune component of the tumor microenvironment. We also observed that tumors treated with CTX-471 had an approximate two-fold reduction in the number of immunosuppressive tumor-associated macrophages.

In addition, we have observed potent activity in other syngeneic tumor models including tumor eradication in the A20 model of lymphoma, the MC38 model of colon carcinoma and in the EMT6 model of breast cancer.

We believe that the ability of CTX-471 to transform the tumor microenvironment through the combined action of immune cell recruitment, alleviation of T-cell exhaustion, suppression of Tregs, and reduction of tumor suppressing macrophages leads to CTX-471’s antitumor activity in mouse models.

In the fourth quarter of 2022, we initiated a clinical trial in collaboration with Merck & Co. (“Merck”, known as MSD outside the United States and Canada) to evaluate CTX-471 in combination with KEYTRUDA® (pembrolizumab). Compass is the study sponsor and Merck provides the clinical supply of KEYTRUDA®. Prior to completing enrollment of this trial, we observed an unexpected suppression of proinflammatory cytokines that was not observed with CTX-471 as a monotherapy. As a result, the combination study will be discontinued.

We have initiated planning of a Phase 2 monotherapy study of CTX-471 in patients with a set of tumors that express a newly identified biomarker of CTX-471 activity. We plan to present data on CTX-471 activity in patients whose tumors express this biomarker at a scientific conference later this year.

CTX-8371 - a bispecific antibody that simultaneously targets both PD-1 and PD-L1

CTX-8371 is a bispecific antibody that binds to both PD-1 and PD-L1, the targets of well-known and widely used checkpoint inhibitor antibodies and in addition acts via differentiated mechanism-of-action that involves cleavage of cell surface PD-1. Preclinical studies demonstrate that CTX-8371 has the ability to outperform PD-1, PD-L1, and combinations of the two to activate T-cells in in vitro assays. In mouse xenografts, treatment with CTX-8371 led to significantly greater tumor growth control and longer survival than treatment with a PD-1 inhibitor alone, a PD-L1 inhibitor alone or the combination of PD-1 and PD-L1 inhibitors.

An IND was accepted and cleared by the FDA in October 2023 and the first patient was dosed in April 2024. The first cohort of this trial was completed in June 2024 with no dose limiting toxicities observed. We initiated the second cohort in July 2024.

OPERATING ACTIVITIES

We have funded our operations primarily with proceeds from the sale of our equity securities. Through June 30, 2024, we have received $430 million in gross proceeds from the sale of equity securities.

We have incurred significant operating losses since inception and have not generated any revenue from the sale of products and we do not expect to generate any revenue from the sale of products in the near future, if at all. Our ability to generate product revenue sufficient to achieve profitability will depend heavily on the successful development and eventual commercialization of our treatments and any future product candidates. Our net losses were $13.1 million and $11.3 million for the three months ended June 30, 2024 and 2023, respectively. Our net losses were $23.9 million and $19.1 million for the six months ended June 30, 2024 and 2023, respectively. We had an accumulated deficit of $339 million on June 30, 2024. We expect to continue to incur significant expenses for at least the next several years as we advance through clinical development, develop additional product candidates and seek regulatory approval of any product candidates that complete clinical development. In addition, if we obtain marketing approval for any product candidates, we expect to incur significant commercialization expenses related to product manufacturing, marketing, sales and distribution. We may also incur expenses in connection with the in-licensing or acquisition of additional product candidates.

Until such time as we can generate significant revenue from product sales, if ever, we expect to finance our operations through equity and debt financings, or other capital sources, which may include collaborations with other companies or other strategic transactions. As of June 30, 2024, we had $146 million in cash, cash equivalents and marketable securities. We expect that such cash resources will enable us to fund our operating expenses and capital expenditure requirements into the first quarter of 2027.

Because of the numerous risks and uncertainties associated with product development, we are unable to predict the timing or amount of increased expenses or when, or if, we will be able to achieve or maintain profitability. Even if we are able to generate product sales, we may not become profitable. If we fail to become profitable or are unable to sustain profitability on a continuing basis, then we may be unable to continue our operations at planned levels and be forced to reduce or terminate our operations. Our financial statements do not include any adjustments that might result from the outcome of this uncertainty.

Components of Results of Operations

Licensing Revenue

Licensing revenue consists of a milestone payment received from a license agreement with Elpiscience Biopharmaceuticals Co., Limited (“Elpiscience”) for CTX-009 in China. The revenue is shown net of a royalty due on the licensing revenue as it is not material to the statement of operations. See footnote 11 of the financial statements in this Quarterly Report on Form 10-Q for further information on the license agreement.

Research and Development

Research and development expenses consist primarily of costs incurred in connection with the development of our product candidates, CTX-471, CTX-8371 and CTX-009. We expense research and development costs as incurred. These expenses include:

●

employee-related expenses including salaries, related benefits and equity-based compensation expense for employees engaged in research and development functions;

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expenses incurred under agreements with organizations that support our platform program development;

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Contract Manufacturing Organizations (“CMO”) that are primarily engaged to provide drug substance and product for our clinical trials, research and development programs, as well as investigative sites and consultants that conduct our clinical trials, nonclinical studies and other scientific development services;

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the cost of acquiring and manufacturing nonclinical and clinical trial materials, including manufacturing registration and validation batches;

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costs related to compliance with quality and regulatory requirements; and

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facilities and equipment expenses.

Advance payments that we make for goods or services to be received in the future for use in research and development activities are recorded as prepaid expenses. Such amounts are recognized as an expense as the goods are delivered or the related services are performed, or until it is no longer expected that the goods will be delivered or the services rendered.

Product candidates in later stages of clinical development generally have higher development costs than those in earlier stages of clinical development, primarily due to the increased size and duration of later-stage clinical trials. We expect that our research and development expenses will increase substantially in connection with our planned clinical development activities in the future. At this time, we cannot accurately estimate or know the nature, timing and costs of the efforts that will be necessary to complete the clinical development of any future product candidates.

The successful development and commercialization of product candidates is highly uncertain. This is due to the numerous risks and uncertainties associated with product development and commercialization.

General and Administrative Expenses

General and administrative expenses consist primarily of salaries and related costs for personnel in executive, finance, business development and administrative functions. General and administrative expenses also include legal fees relating to patent and corporate matters, professional fees for accounting, auditing, tax, insurance, administrative travel expenses, facilities related to administrative personnel and other operating costs.

We anticipate that our general and administrative expenses will increase in the future as we increase our headcount to support our business operations.

Other Income

Other income consists of interest income on marketable securities.

Results of Operations

Comparison of the Three Months Ended June 30, 2024 and 2023

The following table summarizes our results of operations for the three months ended June 30, 2024 and 2023 (in thousands):

	Three Months Ended June 30,
	2024			2023			Change
				(000’s)
Licensing Revenue	$	850		$	—		$	850
Operating expenses:
Research and development		11,174			10,223			951
General and administrative		4,721			3,114			1,607
Total operating expenses		15,895			13,337			2,558
Loss from operations		(15,045	)		(13,337	)		(1,708	)
Other income		1,969			2,059			(90	)
Net loss	$	(13,076	)	$	(11,278	)	$	(1,798	)

Licensing Revenue

Licensing revenue was $850 thousand for the three months ended June 30, 2024. There was no licensing revenue for the three months ended June 30, 2023. The licensing revenue consisted of a $1 million milestone payment from Elpiscience for completing the Phase 1 trial in China. This license revenue is reported net of a 15% sublicense royalty due to ABL Bio (see footnote 11 of the financial statements in this Quarterly Report on Form 10-Q for further information on this sublicense agreement).

Research and Development Expenses

Research and development expenses increased by $1.0 million, or 9%, for the three months ended June 30, 2024 compared to the three months ended June 30, 2023. This increase was primarily attributable to a $2.5 million increase in clinical costs related to the COMPANION-002 trial (CTX-009), partially offset by $1.8 million less in manufacturing expense for the same program.

We track outsourced development, personnel costs and other research and development costs of specific programs. Research and development expenses are summarized by program in the table below (in thousands):

	Three Months Ended June 30,
	2024		2023
	(000’s)
CTX-009	$	7,699	$	6,861
CTX-471		1,312		1,018
CTX-8371		872		1,053
Unallocated research and development expenses		1,291		1,291
Total research and development expenses	$	11,174	$	10,223

General and Administrative Expenses

General and administrative expenses increased $1.6 million, or 52% for the three months ended June 30, 2024 as compared to the same period in 2023. This increase primarily came from costs related to the accrual of expenses associated with our previously announced CEO transition.

Other income

For the three months ended June 30, 2024 and 2023, other income consisted primarily of interest income.

Comparison of the Six Months Ended June 30, 2024 and 2023

The following table summarizes our results of operations for the six months ended June 30, 2024 and 2023 (in thousands):

	Six Months Ended June 30,
	2024			2023			Change
				(000’s)
Licensing Revenue	$	850		$	—		$	850
Operating expenses:
Research and development		20,695			16,862			3,833
General and administrative		7,969			6,183			1,786
Total operating expenses		28,664			23,045			5,619
Loss from operations		(27,814	)		(23,045	)		(5,619	)
Other income		3,951			3,930			21
Net loss	$	(23,863	)	$	(19,115	)	$	(5,598	)

Licensing Revenue

Licensing revenue was $850 thousand for the six months ended June 30, 2024. There was no licensing revenue for the six months ended June 30, 2023. The licensing revenue consisted of a $1 million milestone payment from Elpiscience for completing a Phase 1 trial in China. This license revenue is reported net of a 15% sublicense royalty due ABL Bio (see footnote 11 of the financial statements in this Quarterly Report on Form 10-Q for further information on this sublicense agreement).

Research and Development Expenses

Research and development expenses increased by $3.8 million, or 23%, for the six months ended June 30, 2024, as compared to the six months ended June 30, 2023. This increase was primarily attributable to a $4.8 million increase in clinical costs related to the COMPANION-002 trial (CTX-009 – BTC), partially offset by $2.1 million less in manufacturing expense for the same program.

	Six Months Ended June 30,
	2024		2023
	(000’s)
CTX-009	$	13,380	$	10,778
CTX-471		2,455		1,886
CTX-8371		1,857		1,578
Unallocated research and development expenses		3,003		2,620
Total research and development expenses	$	20,695	$	16,862

General and Administrative Expenses

General and administrative expenses increased $1.8 million, or 29% for the six months ended June 30, 2024 as compared to the same period in 2023. This increase primarily came from costs related to the accrual of expenses associated with our previously announced CEO transition.

Other income

For the six months ended June 30, 2024 and 2023, other income consisted primarily of interest income.

Liquidity and Capital Resources

Since our inception, we have devoted substantially all of our efforts to organizing and staffing our Company, business planning, raising capital, research and development activities, building our intellectual property portfolio and providing general and administrative support for these operations. We have funded our operations primarily with proceeds from the sale of our equity securities. Through June 30, 2024, we have received $430 million in gross proceeds from the sale of equity securities. As of June 30, 2024, we had cash, cash equivalents and marketable securities of $146 million.

For the first six months of 2024, we sold through our at-the-market (“ATM”) agreement with Jefferies LLC, 9,790,577 shares of common stock at an average price of $1.85 for total proceeds of $18.1 million and net proceeds of $17.6 million.

Funding Requirements

Our primary use of cash is to fund operating expenses, primarily research and development expenditures. Cash used to fund operating expenses is impacted by the timing of when we pay these expenses, as reflected in the change in our outstanding accounts payable, accrued expenses and prepaid expenses. Because of the numerous risks and uncertainties associated with research, development and commercialization of pharmaceutical products, we are unable to estimate the exact amount of our operating capital requirements. Our future funding requirements will depend on many factors, including, but not limited to:

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the scope, timing, progress and results of discovery, preclinical development, laboratory testing and clinical trials for our product candidates;

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the costs of manufacturing our product candidates for clinical trials and in preparation for marketing approval and commercialization;

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the extent to which we enter into collaborations or other arrangements with additional third parties in order to further develop our product candidates;

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the costs of preparing, filing and prosecuting patent applications, maintaining and enforcing our intellectual property rights and defending intellectual property-related claims;

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the costs and fees associated with the discovery, acquisition or in-license of additional product candidates or technologies;

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our ability to establish additional collaborations on favorable terms, if at all;

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the costs required to scale up our clinical, regulatory and manufacturing capabilities;

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the costs of future commercialization activities, if any, including establishing sales, marketing, manufacturing and distribution capabilities, for any of our product candidates for which we receive marketing approval; and

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revenue, if any, received from commercial sales of our product candidates, should any of our product candidates receive marketing approval.

Until such time, if ever, as we can generate substantial product revenue, we expect to finance our operations through a combination of equity offerings, debt financings, collaborations, strategic alliances and marketing, distribution or licensing arrangements. To the extent that we raise additional capital through the sale of equity or convertible debt securities, current stockholders’ interest will be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect rights of common stockholders. Debt financing and preferred equity financing, if available, may involve agreements that include covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making acquisitions or capital expenditures or declaring dividends. If we raise additional funds through collaborations, strategic alliances or marketing, distribution or licensing arrangements with third parties, we may have to relinquish valuable rights to our technologies, future revenue streams, research programs or product candidates, or grant licenses on terms that may not be favorable to us. If we are unable to raise additional funds through equity or debt financings or other arrangements when needed, we may be required to delay, limit, reduce or terminate our research, product development or future commercialization efforts, or grant rights to develop and market product candidates that we would otherwise prefer to develop and market ourselves.

Cash Flows

The following table shows a summary of our cash flows for the periods indicated (in thousands):

	Six Months Ended June 30,
	2024			2023
	(000’s)
Cash used in operating activities	$	(24,642	)	$	(22,342	)
Cash provided by (used in) investing activities		2,384			3,602
Cash provided by financing activities		17,434			3,072
Net change in cash and cash equivalents	$	(4,824	)	$	(15,668	)

Operating Activities

During the six months ended June 30, 2024, we used $24.6 million of cash in operating activities, resulting from our net loss of $23.9 million minus the change in operating assets and liabilities of $4.7 million, partially offset by non-cash charges of $3.9 million (primarily from share-based compensation expense of $4.1 million).

During the six months ended June 30, 2023, we used $22.3 million of cash in operating activities, resulting from our net loss of $19.1 million minus the change in operating assets and liabilities of $5.4 million, partially offset by non-cash charges of $2.2 million (primarily from share-based compensation expense of $2.9 million).

Investing Activities

During the six months ended June 30, 2024, $2.4 million of cash was provided by investing activities, related to the net sale of marketable securities. During the six months ended June 30, 2023, $3.6 million of cash was provided by investing activities which primarily related to the net sale of marketable securities.

Financing Activities

During the six months ended June 30, 2024, $17.4 million of cash was provided by financing activities. This primarily included $17.6 million of net cash from sale of common stock under an ATM Agreement, after issuance costs. During the six months ended June 30, 2023, $3.1 million of cash was provided by financing activities. This primarily included $3.0 million of net cash from sale of common stock under an ATM Agreement, after issuance costs.

Future Funding Requirements

We expect our expenses to increase substantially in connection with our ongoing activities. The timing and amount of our operating expenditures will depend largely on:

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the initiation, progress, timing, costs and results of clinical trials for our product candidates or any future product candidates we may develop;

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the initiation, progress, timing, costs and results of nonclinical studies for our product candidates or any future product candidates we may develop;

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our ability to maintain our relationships with key collaborators;

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the outcome, timing and cost of seeking and obtaining regulatory approvals from the FDA and comparable foreign regulatory authorities, including the potential for such authorities to require that we perform more nonclinical studies or clinical trials than those that we currently expect or change their requirements on studies that had previously been agreed to;

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the cost to establish, maintain, expand, enforce and defend the scope of our intellectual property portfolio, including the amount and timing of any payments we may be required to make, or that we may receive, in connection with licensing, preparing, filing, prosecuting, defending and enforcing any patents or other intellectual property rights;

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the effect of competing technological and market developments;

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the costs of continuing to grow our business, including hiring key personnel and maintain or acquiring operating space;

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market acceptance of any approved product candidates, including product pricing, as well as product coverage and the adequacy of reimbursement by third-party payors;

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the cost of acquiring, licensing or investing in additional businesses, products, product candidates and technologies;

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the cost and timing of selecting and validating a manufacturing site for commercial-scale manufacturing; and

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the cost of establishing sales, marketing and distribution capabilities for any product candidates for which we may receive regulatory approval and that we determine to commercialize.

We believe that our existing cash, cash equivalents and marketable securities as of filing of this Quarterly Report on Form 10-Q will enable us to fund our operating expenses and capital expenditure requirements into the first quarter of 2027 based on our current plans, which may change based on clinical or pre-clinical results. These plans include: A Phase 2/3 and two Phase 2 clinical trials of CTX-009, a Phase 2 trial for CTX-471 and a Phase 1a trial of CTX-8371. We expect that we will require additional funding to complete the clinical development of these three programs, commercialize our product candidates, if we receive regulatory approval, and pursue in-licenses or acquisitions of other product candidates. If we receive regulatory approval for CTX-009, CTX-471 or CTX-8371 or other product candidates, we expect to incur significant commercialization expenses related to product manufacturing, sales, marketing and distribution, depending on where we choose to commercialize these product candidates ourselves.

Until such time, if ever, as we can generate substantial product revenue, we expect to finance our cash needs through a combination of equity and debt financings, collaborations, strategic alliances, and marketing, distribution or licensing arrangements with third parties. To the extent that we raise additional capital through the sale of equity or convertible debt securities, ownership interest may be materially diluted, and the terms of such securities could include liquidation or other preferences that adversely affect your rights as a common stockholder. Debt financing and preferred equity financing, if available, may involve agreements that include restrictive covenants that limit our ability to take specified actions, such as incurring additional debt, making capital expenditures or declaring dividends. If we raise funds through collaborations, strategic alliances or marketing, distribution or licensing arrangements with third parties, we may have to relinquish valuable rights to our technologies, future revenue streams, research programs or product candidates or grant licenses on terms that may not be favorable to us. If we are unable to raise additional funds through equity or debt financings or other arrangements when needed, we may be required to delay, reduce or eliminate our product development or future commercialization efforts, or grant rights to develop and market product candidates that we would otherwise prefer to develop and market ourselves.

Item 3. Quantitative and Qualitative Disclosures About Market Risk.

Not applicable since we are a smaller reporting company.

Item 4. Controls and Procedures.

Management’s Evaluation of Our Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer (Principal Executive and Principal Financial Officer), evaluated the effectiveness of our disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended, or the Exchange Act, as of June 30, 2024. Management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives and management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Based on the evaluation of our disclosure controls and procedures as of June 30, 2024, our Chief Executive Officer (Principal Executive Officer and Principal Financial Officer) concluded that, as of such date, our disclosure controls and procedures were effective.

Changes in Internal Control over Financial Reporting

There was no change in our internal control over financial reporting, as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act, that occurred during the quarter ended June 30, 2024 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

PART II—OTHER INFORMATION

Item 1. Legal Proceedings.

As of the date of this Quarterly Report on Form 10-Q, we are not involved in any material legal proceedings. However, from time to time, we could be subject to various legal proceedings and claims that arise in the ordinary course of our business activities. Regardless of the outcome, legal proceedings can have an adverse impact on us because of defense and settlement costs, diversion of management resources and other factors.

Item 1A. Risk Factors

In addition to the other information set forth in this report, you should carefully consider the risk factors discussed in Part I, Item 1A “Risk Factors” in our Annual Report on Form 10-K for the fiscal year ended December 31, 2023, which could materially affect our business, financial condition, or results of operations.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.

None.

Item 3. Defaults Upon Senior Securities.

None.

Item 4. Mine Safety Disclosures.

Not applicable.

Item 5. Other Information.

During the three-month period ended June 30, 2024, none of our directors or officers (as defined in Rule 16a-1(f) of the Securities Exchange Act of 1934, as amended) adopted, terminated or modified a Rule 10b5-1 trading arrangement or any “non-Rule 10b5-1 trading agreement” (as defined in Item 408(c) of Regulation S-K).

Item 6. Exhibits.

Exhibit Number		Description

3.1		Amended and Restated Certificate of Incorporation (incorporated by reference to Exhibit 3.2 to the Current Report on Form 8-K filed with the SEC on June 23, 2020).
3.2		Amended and Restated Bylaws (incorporated by reference to Exhibit 3.3 to the Current Report on Form 8-K filed with the SEC on June 23, 2020).
10.1		Separation Agreement, dated May 28, 2024, by and between Compass Therapeutics, Inc. and Vered Bisker-Leib, PhD (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed with the SEC on May 28, 2024).
10.2		Consulting Agreement, dated May 28, 2024, by and between Compass Therapeutics, Inc. and Vered Bisker-Leib, PhD (incorporated by reference to Exhibit 10.2 to the Current Report on Form 8-K filed with the SEC on May 28, 2024).
31.1*		Certification of Principal Executive and Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1**		Certification of Principal Executive and Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.


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* Filed herewith.

** This exhibit is being furnished and shall not be deemed to be “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liability of that section, nor shall such exhibits be deemed to be incorporated by reference in any registration statement or other document filed under the Securities Act or the Exchange Act, except as otherwise stated in such filing.

SIGNATURES

Pursuant to the requirements of the Exchange Act, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	Compass Therapeutics, Inc.

Date: August 12, 2024	By:	/s/ Thomas Schuetz
		Thomas Schuetz, MD
		Principal Executive Officer, Principal Financial and Accounting Officer

Date: August 12, 2024	By:	/s/ Neil Lerner
		Neil Lerner, CPA
		Vice President - Finance

Exhibit 31.1

CERTIFICATION PURSUANT TO

RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934,

AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Thomas Schuetz, certify that:

I have reviewed this Quarterly Report on Form 10-Q of Compass Therapeutics, Inc.;

Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

I am responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)

Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)

Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)

Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)

Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)

All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)

Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: August 12, 2024	By:	/s/ Thomas Schuetz
		Thomas Schuetz
		Principal Executive Officer, Principal Financial and Accounting Officer

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Compass Therapeutics, Inc. (the “Company”) on Form 10-Q for the period ended June 30, 2024 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1)

The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)

The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

Date: August 12, 2024	By:	/s/ Thomas Schuetz
		Thomas Schuetz
		Principal Executive Officer, Principal Financial and Accounting Officer

Document And Entity Information - shares	6 Months Ended
Document And Entity Information - shares	Jun. 30, 2024	Aug. 08, 2024
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2024
Document Transition Report	false
Entity File Number	001-39696
Entity Registrant Name	COMPASS THERAPEUTICS, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	82-4876496
Entity Address, Address Line One	80 Guest St., Suite 601
Entity Address, City or Town	Boston
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02135
City Area Code	617
Local Phone Number	500-8099
Title of 12(b) Security	Common Stock, $0.0001 par value per share
Trading Symbol	CMPX
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		137,589,171
Entity Central Index Key	0001738021
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q2
Amendment Flag	false

Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 19,404	$ 24,228
Marketable securities	126,823	128,233
Prepaid expenses and other current assets	7,319	1,420
Total current assets	153,546	153,881
Property and equipment, net	592	898
Operating lease, right-of-use ("ROU") asset	1,153	1,776
Other assets	320	320
Total assets	155,611	156,875
Current liabilities:
Accounts payable	1,192	4,090
Accrued expenses	7,227	2,514
Operating lease obligations, current portion	1,088	1,197
Total current liabilities	9,507	7,801
Operating lease obligations, long-term portion	0	536
Total liabilities	9,507	8,337
Commitments and Contingencies
Stockholders' equity:
Common stock, $0.0001 par value: 300,000 shares authorized; 137,589 and 127,668 shares issued and outstanding at June 30, 2024 and December 31, 2023, respectively	14	13
Additional paid-in-capital	485,352	463,796
Accumulated other comprehensive (loss) income	(91)	37
Accumulated deficit	(339,171)	(315,308)
Total stockholders' equity	146,104	148,538
Total liabilities and stockholders' equity	$ 155,611	$ 156,875

Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares shares in Thousands	Jun. 30, 2024	Dec. 31, 2023
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.0001	$ 0.0001
Common Stock, Shares Authorized (in shares)	300,000	300,000
Common Stock, Shares, Issued (in shares)	137,589	127,668
Common Stock, Shares, Outstanding (in shares)	137,589	127,668

Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Licensing revenue	$ 850	$ 0	$ 850	$ 0
Research and development	11,174	10,223	20,695	16,862
General and administrative	4,721	3,114	7,969	6,183
Total operating expenses	15,895	13,337	28,664	23,045
Loss from operations	(15,045)	(13,337)	(27,814)	(23,045)
Other income	1,969	2,059	3,951	3,930
Loss before income tax expense	(13,076)	(11,278)	(23,863)	(19,115)
Income tax expense	0	0	0	0
Net loss	$ (13,076)	$ (11,278)	$ (23,863)	$ (19,115)
Net loss per share - basic and diluted (in dollars per share)	$ (0.1)	$ (0.09)	$ (0.17)	$ (0.15)
Basic and diluted weighted average shares outstanding (in shares)	137,589	126,729	137,098	126,539
Other comprehensive loss:
Net loss	$ (13,076)	$ (11,278)	$ (23,863)	$ (19,115)
Unrealized loss on marketable securities	(1)	(361)	(128)	(205)
Comprehensive loss	$ (13,077)	$ (11,639)	$ (23,991)	$ (19,320)

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2022	126,302
Balance at Dec. 31, 2022	$ 13	$ 454,741	$ (302)	$ (272,814)	$ 181,638
Share-based awards, net of tax remittance (in shares)	61
Share-based awards, net of tax remittance	$ 0	0	0	0	0
Stock-based compensation	0	1,267	0	0	1,267
Unrealized loss on marketable securities	0	0	156	0	156
Net loss	0	0	0	(7,837)	(7,837)
Stock-based compensation	$ 0	1,267	0	0	1,267
Vesting of share-based awards (in shares)	61
Vesting of share-based awards	$ 0	0	0	0	0
Common stock issued upon exercise of options (in shares)	12
Common stock issued upon exercise of options	$ 0	41	0	0	41
Balance (in shares) at Mar. 31, 2023	126,375
Balance at Mar. 31, 2023	$ 13	456,049	(146)	(280,651)	175,265
Balance (in shares) at Dec. 31, 2022	126,302
Balance at Dec. 31, 2022	$ 13	454,741	(302)	(272,814)	181,638
Unrealized loss on marketable securities					(205)
Net loss					(19,115)
Balance (in shares) at Jun. 30, 2023	127,388
Balance at Jun. 30, 2023	$ 13	460,709	(507)	(291,929)	168,286
Balance (in shares) at Mar. 31, 2023	126,375
Balance at Mar. 31, 2023	$ 13	456,049	(146)	(280,651)	175,265
Common shares issued, net of issuance costs of $0.5 million (in shares)	952
Common shares issued, net of issuance costs of $0.5 million	$ 0	3,032	0	0	3,032
Share-based awards, net of tax remittance (in shares)	61
Share-based awards, net of tax remittance	$ 0	0	0	0	0
Stock-based compensation	0	1,628	0	0	1,628
Unrealized loss on marketable securities	0	0	(361)	0	(361)
Net loss	0	0	0	(11,278)	(11,278)
Stock-based compensation	$ 0	1,628	0	0	1,628
Vesting of share-based awards (in shares)	61
Vesting of share-based awards	$ 0	0	0	0	0
Balance (in shares) at Jun. 30, 2023	127,388
Balance at Jun. 30, 2023	$ 13	460,709	(507)	(291,929)	168,286
Balance (in shares) at Dec. 31, 2023	127,668
Balance at Dec. 31, 2023	$ 13	463,796	37	(315,308)	148,538
Common shares issued, net of issuance costs of $0.5 million (in shares)	9,790
Common shares issued, net of issuance costs of $0.5 million	$ 1	17,568	0	0	17,569
Share-based awards, net of tax remittance (in shares)	131
Share-based awards, net of tax remittance		(136)	0	0	(136)
Stock-based compensation	$ 0	2,003	0	0	2,003
Unrealized loss on marketable securities	0	0	(127)	0	(127)
Net loss	0	0	0	(10,787)	(10,787)
Stock-based compensation	$ 0	2,003	0	0	2,003
Vesting of share-based awards (in shares)	131
Vesting of share-based awards		(136)	0	0	(136)
Balance (in shares) at Mar. 31, 2024	137,589
Balance at Mar. 31, 2024	$ 14	483,231	(90)	(326,095)	157,060
Balance (in shares) at Dec. 31, 2023	127,668
Balance at Dec. 31, 2023	$ 13	463,796	37	(315,308)	148,538
Unrealized loss on marketable securities					(128)
Net loss					$ (23,863)
Common stock issued upon exercise of options (in shares)					(0)
Balance (in shares) at Jun. 30, 2024	137,589
Balance at Jun. 30, 2024	$ 14	485,352	(91)	(339,171)	$ 146,104
Balance (in shares) at Mar. 31, 2024	137,589
Balance at Mar. 31, 2024	$ 14	483,231	(90)	(326,095)	157,060
Stock-based compensation	0	2,121	0	0	2,121
Unrealized loss on marketable securities	0	0	(1)	0	(1)
Net loss	0	0	0	(13,076)	(13,076)
Stock-based compensation	$ 0	2,121	0	0	2,121
Balance (in shares) at Jun. 30, 2024	137,589
Balance at Jun. 30, 2024	$ 14	$ 485,352	$ (91)	$ (339,171)	$ 146,104

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parentheticals) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Jun. 30, 2023
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs	$ 0.5	$ 0.1

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net loss	$ (23,863)	$ (19,115)
us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract
Depreciation and amortization	306	374
Share-based compensation	4,124	2,895
Amortization of premium and discount on marketable securities	(1,103)	(1,628)
ROU asset amortization	623	582
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(5,899)	1,662
Accounts payable	(2,898)	(2,658)
Accrued expenses	4,713	(3,863)
Operating lease liability	(645)	(591)
Net cash used in operating activities	(24,642)	(22,342)
Cash flows from investing activities:
Purchases of marketable securities	(72,950)	(92,964)
Proceeds from sale or maturities of marketable securities	75,334	96,577
Purchases of property and equipment	0	(11)
Net cash provided by investing activities	2,384	3,602
Cash flows from financing activities:
Proceeds from issuance of common stock	(18,113)	(3,126)
Issuance costs from issuance of common stock	(543)	(95)
Taxes paid related to net shares settlement of RSUs	(136)	0
Proceeds from exercise of stock options	0	41
Net cash provided by financing activities	17,434	3,072
Net change in cash and cash equivalents	(4,824)	(15,668)
Cash and cash equivalents at beginning of period	24,228	34,946
Cash and cash equivalents at end of period	19,404	19,278
Supplemental disclosure of cash flow information
Unrealized (loss) gain on marketable securities	$ (128)	$ (205)

Note 1 - Nature of Business and Basis of Presentation

6 Months Ended

Jun. 30, 2024

Notes to Financial Statements

Business Description and Basis of Presentation [Text Block]

1.	Nature of Business and Basis of Presentation

Liquidity

Note 2 - Summary of Significant Accounting Policies

6 Months Ended

Jun. 30, 2024

Notes to Financial Statements

Significant Accounting Policies [Text Block]

2.	Summary of Significant Accounting Policies

There have been no material changes to the significant accounting policies previously disclosed in the Company’s Annual Report.

Note 3 - Fair Value Measurements

6 Months Ended

Jun. 30, 2024

Notes to Financial Statements

Fair Value Disclosures [Text Block]

3.	Fair Value Measurements

	Fair Value Measurements as of June 30, 2024 (000's):
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value
Assets
Corporate bonds	$	—	$	63,101	$	—	$	63,101
Commercial paper		24,204		—		—		24,204
Certificates of deposit		—		17,076		—		17,076
U.S. government treasuries		12,728		—		—		12,728
Asset-backed securities		—		9,714		—		9,714
Cash equivalents		529		—		—		529
Total assets	$	37,461	$	89,891	$	—	$	127,352

	Fair Value Measurements as of December 31, 2023 (000's):
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value
Assets
Corporate bonds	$	—	$	54,281	$	—	$	54,281
Commercial paper		28,534		—		—		28,534
Certificates of deposit		—		18,866		—		18,866
U.S. government treasuries		16,080		—		—		16,080
Asset-backed securities		—		10,472		—		10,472
Money market funds (cash equivalents)		575		—		—		575
Total assets	$	45,189	$	83,619	$	—	$	128,808

Note 4 - Marketable Securities

6 Months Ended

Jun. 30, 2024

Notes to Financial Statements

Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]

4.	Marketable Securities

The following tables summarize marketable securities held (in thousands):

	Fair Value Measurements as of June 30, 2024 Using:
	Amortized Cost		Unrealized gains		Unrealized Losses			Fair Value
Assets
Corporate bonds	$	63,135	$	43	$	(77	)	$	63,101
Commercial paper		24,217		—		(13	)		24,204
Certificates of deposit		17,068		10		(2	)		17,076
U.S. government treasuries		12,792		—		(64	)		12,728
Asset-backed securities		9,702		14		(2	)		9,714
Total assets	$	126,914	$	67	$	(158	)	$	126,823

	Fair Value Measurements as of December 31, 2023 Using:
	Amortized Cost		Unrealized gains		Unrealized Losses			Fair Value
Assets
Corporate bonds	$	54,256	$	74	$	(49	)	$	54,281
Commercial paper		28,507		30		(3	)		28,534
Certificates of deposit		18,850		17		(1	)		18,866
U.S. government treasuries		16,127		3		(50	)		16,080
Asset-backed securities		10,456		23		(7	)		10,472
Total assets	$	128,196	$	147	$	(110	)	$	128,233

	As of
	June 30, 2024		December 31, 2023
Maturing in one year or less	$	88,752	$	93,117
Maturing after one year through two years		38,071		35,116
Total	$	126,823	$	128,233

Note 5 - Property and Equipment

6 Months Ended

Jun. 30, 2024

Notes to Financial Statements

Property, Plant and Equipment Disclosure [Text Block]

5.	Property and Equipment

Property and equipment consist of the following (in thousands):

	June 30, 2024			December 31, 2023
Equipment	$	5,167		$	5,167
Leasehold improvements		1,612			1,612
Software		364			364
Furniture and fixtures		22			22
Total property and equipment–at cost		7,165			7,165
Less: Accumulated depreciation		(6,573	)		(6,267	)
Property and equipment, net	$	592		$	898

Depreciation and amortization expense for the six months ended June 30, 2024 was $0.3 million as compared to $0.4 million for the same period in 2023.

Note 6 - Accrued Expenses

6 Months Ended

Jun. 30, 2024

Notes to Financial Statements

Accounts Payable and Accrued Liabilities Disclosure [Text Block]

6.	Accrued Expenses

Accrued expenses consist of the following (in thousands):

	June 30,		December 31,
	2024		2023
Project expenses	$	4,605	$	336
Compensation and benefits		2,314		1,938
Other		308		240
Total accrued expenses	$	7,227	$	2,514

Note 7 - Commitments and Contingencies

6 Months Ended

Jun. 30, 2024

Notes to Financial Statements

Commitments and Contingencies Disclosure [Text Block]

7.	Commitments and Contingencies

Leases

Remainder of 2024	$	575
2025		543
Total minimum lease payments		1,118
Less: amount of lease payments representing interest		(30	)
Present value of future minimum lease payments		1,088
Less: operating lease obligations, current portion		(1,088	)
Operating lease obligations, long-term portion	$	—

Defined Contribution Plan

Note 8 - Stock-based Compensation

6 Months Ended

Jun. 30, 2024

Notes to Financial Statements

Share-Based Payment Arrangement [Text Block]

8.	Stock-Based Compensation

Stock-based compensation expense for the three and six months ended June 30, 2024 and 2023 was classified in the condensed consolidated statement of operations as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
	(000’s)				(000’s)
Research and development	$	458	$	146	$	1,382	$	229
General and administrative		1,663		1,482		2,742		2,666
Total	$	2,121	$	1,628	$	4,124	$	2,895

As of June 30, 2024, remaining unrecognized stock-based compensation cost from all plans to be recognized in future periods totaled $19.4 million.

2020 Plan

Stock Options:

The following table summarizes the stock option activity for the 2020 Plan:

			Weighted		Weighted
	Number of		Average		Average		Aggregate
	Unvested		Exercise		Remaining		Intrinsic
	Options		Price		Contractual		Value
	(000's)		Per Share		Term (in years)		($000's)
Outstanding at December 31, 2023		7,876	$	3.81		8.05	$	11
Granted		3,453	$	1.82		9.55		—
Exercised		—	$	—		—		—
Forfeited/canceled		—	$	—		—		—
Outstanding at June 30, 2024		11,329	$	3.21		8.16	$	—
Vested at June 30, 2024		5,114	$	3.95		7.27	$	—

The weighted average assumptions used in the Black-Scholes pricing model to determine the fair value of stock options granted during the six months ended June 30, 2024 and 2023 were as follows:

	Six Months Ended June 30,
	2024			2023
Expected term (in years)		6.0			6.0
Risk-free rate		4.04	%		3.80	%
Expected volatility		80	%		88	%
Expected dividend yield		—			—

RSUs:

The following table summarizes the RSU activity for the 2020 Plan:

	Shares (000's)			Weighted Average Price Per Share		Weighted Average Fair Value ($000's)
Unvested, December 31, 2023		1,500		$	3.89	$	5,835
Granted		2,391			1.93		4,615
Vested		(225	)		3.93		(884	)
Forfeited or canceled		—			—		—
Unvested, June 30, 2024		3,666		$	2.61	$	9,565

Note 9 - Related Parties and Related-Party Transactions

6 Months Ended

Jun. 30, 2024

Notes to Financial Statements

9.	Related Parties and Related-Party Transactions

There were no material related party transactions during the six months ended June 30, 2024 and 2023.

Note 10 - Other Income

6 Months Ended

Jun. 30, 2024

Notes to Financial Statements

Other Nonoperating Income and Expense [Text Block]

10.

Other Income

Note 11 - License, Research and Collaboration Agreements

6 Months Ended

Jun. 30, 2024

Notes to Financial Statements

Collaborative Arrangement Disclosure [Text Block]

11.

License, Research and Collaboration Agreements

Collaboration Agreements

ABL Bio Corporation ("ABL Bio") Agreement

Adimab Agreement

Elpiscience Agreement

Note 12 - Stockholders' Equity

6 Months Ended

Jun. 30, 2024

Notes to Financial Statements

Equity [Text Block]

12.

Stockholders’ Equity

Insider Trading Arrangements	6 Months Ended
Insider Trading Arrangements	Jun. 30, 2024
Insider Trading Arr Line Items
Material Terms of Trading Arrangement [Text Block]	Item 5. Other Information. During the three-month period ended June 30, 2024, none of our directors or officers (as defined in Rule 16a-1(f) of the Securities Exchange Act of 1934, as amended) adopted, terminated or modified a Rule 10b5-1 trading arrangement or any “non-Rule 10b5-1 trading agreement” (as defined in Item 408(c) of Regulation S-K).
Rule 10b5-1 Arrangement Adopted [Flag]	false
Rule 10b5-1 Arrangement Terminated [Flag]	false
Non-Rule 10b5-1 Arrangement Adopted [Flag]	false
Non-Rule 10b5-1 Arrangement Terminated [Flag]	false

Note 3 - Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2024

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	Fair Value Measurements as of June 30, 2024 (000's):
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value
Assets
Corporate bonds	$	—	$	63,101	$	—	$	63,101
Commercial paper		24,204		—		—		24,204
Certificates of deposit		—		17,076		—		17,076
U.S. government treasuries		12,728		—		—		12,728
Asset-backed securities		—		9,714		—		9,714
Cash equivalents		529		—		—		529
Total assets	$	37,461	$	89,891	$	—	$	127,352

	Fair Value Measurements as of December 31, 2023 (000's):
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value
Assets
Corporate bonds	$	—	$	54,281	$	—	$	54,281
Commercial paper		28,534		—		—		28,534
Certificates of deposit		—		18,866		—		18,866
U.S. government treasuries		16,080		—		—		16,080
Asset-backed securities		—		10,472		—		10,472
Money market funds (cash equivalents)		575		—		—		575
Total assets	$	45,189	$	83,619	$	—	$	128,808

Note 4 - Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2024

Notes Tables

Marketable Securities [Table Text Block]

	Fair Value Measurements as of June 30, 2024 Using:
	Amortized Cost		Unrealized gains		Unrealized Losses			Fair Value
Assets
Corporate bonds	$	63,135	$	43	$	(77	)	$	63,101
Commercial paper		24,217		—		(13	)		24,204
Certificates of deposit		17,068		10		(2	)		17,076
U.S. government treasuries		12,792		—		(64	)		12,728
Asset-backed securities		9,702		14		(2	)		9,714
Total assets	$	126,914	$	67	$	(158	)	$	126,823

	Fair Value Measurements as of December 31, 2023 Using:
	Amortized Cost		Unrealized gains		Unrealized Losses			Fair Value
Assets
Corporate bonds	$	54,256	$	74	$	(49	)	$	54,281
Commercial paper		28,507		30		(3	)		28,534
Certificates of deposit		18,850		17		(1	)		18,866
U.S. government treasuries		16,127		3		(50	)		16,080
Asset-backed securities		10,456		23		(7	)		10,472
Total assets	$	128,196	$	147	$	(110	)	$	128,233

Investments Classified by Contractual Maturity Date [Table Text Block]

	As of
	June 30, 2024		December 31, 2023
Maturing in one year or less	$	88,752	$	93,117
Maturing after one year through two years		38,071		35,116
Total	$	126,823	$	128,233

Note 5 - Property and Equipment (Tables)

6 Months Ended

Jun. 30, 2024

Notes Tables

Property, Plant and Equipment [Table Text Block]

	June 30, 2024			December 31, 2023
Equipment	$	5,167		$	5,167
Leasehold improvements		1,612			1,612
Software		364			364
Furniture and fixtures		22			22
Total property and equipment–at cost		7,165			7,165
Less: Accumulated depreciation		(6,573	)		(6,267	)
Property and equipment, net	$	592		$	898

Note 6 - Accrued Expenses (Tables)

6 Months Ended

Jun. 30, 2024

Notes Tables

Schedule of Accrued Liabilities [Table Text Block]

	June 30,		December 31,
	2024		2023
Project expenses	$	4,605	$	336
Compensation and benefits		2,314		1,938
Other		308		240
Total accrued expenses	$	7,227	$	2,514

Note 7 - Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2024

Notes Tables

Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]

Remainder of 2024	$	575
2025		543
Total minimum lease payments		1,118
Less: amount of lease payments representing interest		(30	)
Present value of future minimum lease payments		1,088
Less: operating lease obligations, current portion		(1,088	)
Operating lease obligations, long-term portion	$	—

Note 8 - Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2024

Notes Tables

Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
	(000’s)				(000’s)
Research and development	$	458	$	146	$	1,382	$	229
General and administrative		1,663		1,482		2,742		2,666
Total	$	2,121	$	1,628	$	4,124	$	2,895

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

			Weighted		Weighted
	Number of		Average		Average		Aggregate
	Unvested		Exercise		Remaining		Intrinsic
	Options		Price		Contractual		Value
	(000's)		Per Share		Term (in years)		($000's)
Outstanding at December 31, 2023		7,876	$	3.81		8.05	$	11
Granted		3,453	$	1.82		9.55		—
Exercised		—	$	—		—		—
Forfeited/canceled		—	$	—		—		—
Outstanding at June 30, 2024		11,329	$	3.21		8.16	$	—
Vested at June 30, 2024		5,114	$	3.95		7.27	$	—

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Six Months Ended June 30,
	2024			2023
Expected term (in years)		6.0			6.0
Risk-free rate		4.04	%		3.80	%
Expected volatility		80	%		88	%
Expected dividend yield		—			—

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

	Shares (000's)			Weighted Average Price Per Share		Weighted Average Fair Value ($000's)
Unvested, December 31, 2023		1,500		$	3.89	$	5,835
Granted		2,391			1.93		4,615
Vested		(225	)		3.93		(884	)
Forfeited or canceled		—			—		—
Unvested, June 30, 2024		3,666		$	2.61	$	9,565

Note 1 - Nature of Business and Basis of Presentation (Details Textual) $ in Millions	75 Months Ended
	Jun. 30, 2024 USD ($)
Proceeds from Issuance or Sale of Equity	$ 430
Cash and Marketable Securities	$ 146

Note 3 - Fair Value Measurements - Financial Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Marketable Securities	$ 126,823	$ 128,233
Corporate Debt Securities [Member]
Marketable Securities	63,101	54,281
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Marketable Securities	24,204	28,534
Certificates of Deposit [Member]
Marketable Securities	17,076	18,866
US Treasury Securities [Member]
Marketable Securities	12,728	16,080
Asset-Backed Securities [Member]
Marketable Securities	9,714	10,472
Fair Value, Recurring [Member]
Cash equivalents	529	575
Total assets	127,352	128,808
Fair Value, Recurring [Member] \| Corporate Debt Securities [Member]
Marketable Securities	63,101	54,281
Fair Value, Recurring [Member] \| Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Marketable Securities	24,204	28,534
Fair Value, Recurring [Member] \| Certificates of Deposit [Member]
Marketable Securities	17,076	18,866
Fair Value, Recurring [Member] \| US Treasury Securities [Member]
Marketable Securities	12,728	16,080
Fair Value, Recurring [Member] \| Asset-Backed Securities [Member]
Marketable Securities	9,714	10,472
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Cash equivalents	529	575
Total assets	37,461	45,189
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member] \| Corporate Debt Securities [Member]
Marketable Securities	0	0
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member] \| Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Marketable Securities	24,204	28,534
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member] \| Certificates of Deposit [Member]
Marketable Securities	0	0
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member] \| US Treasury Securities [Member]
Marketable Securities	12,728	16,080
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member] \| Asset-Backed Securities [Member]
Marketable Securities	0	0
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Cash equivalents	0	0
Total assets	89,891	83,619
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Corporate Debt Securities [Member]
Marketable Securities	63,101	54,281
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Marketable Securities	0	0
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Certificates of Deposit [Member]
Marketable Securities	17,076	18,866
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| US Treasury Securities [Member]
Marketable Securities	0	0
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member] \| Asset-Backed Securities [Member]
Marketable Securities	9,714	10,472
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Cash equivalents	0	0
Total assets	0	0
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| Corporate Debt Securities [Member]
Marketable Securities	0	0
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Marketable Securities	0	0
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| Certificates of Deposit [Member]
Marketable Securities	0	0
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| US Treasury Securities [Member]
Marketable Securities	0	0
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member] \| Asset-Backed Securities [Member]
Marketable Securities	$ 0	$ 0

Note 4 - Marketable Securities - Marketable Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Amortized Cost	$ 126,914	$ 128,196
Unrealized gains	67	147
Unrealized Losses	(158)	(110)
Fair Value	126,823	128,233
Marketable Securities	126,823	128,233
Corporate Debt Securities [Member]
Amortized Cost	63,135	54,256
Unrealized gains	43	74
Unrealized Losses	(77)	(49)
Fair Value	63,101	54,281
Marketable Securities	63,101	54,281
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Amortized Cost	24,217	28,507
Unrealized gains	0	30
Unrealized Losses	(13)	(3)
Fair Value	24,204	28,534
Marketable Securities	24,204	28,534
Certificates of Deposit [Member]
Amortized Cost	17,068	18,850
Unrealized gains	10	17
Unrealized Losses	(2)	(1)
Fair Value	17,076	18,866
Marketable Securities	17,076	18,866
US Treasury Securities [Member]
Amortized Cost	12,792	16,127
Unrealized gains	0	3
Unrealized Losses	(64)	(50)
Fair Value	12,728	16,080
Marketable Securities	12,728	16,080
Asset-Backed Securities [Member]
Amortized Cost	9,702	10,456
Unrealized gains	14	23
Unrealized Losses	(2)	(7)
Fair Value	9,714	10,472
Marketable Securities	$ 9,714	$ 10,472

Note 4 - Marketable Securities - Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Maturing in one year or less	$ 88,752	$ 93,117
Maturing after one year through two years	38,071	35,116
Total	$ 126,823	$ 128,233

Note 5 - Property and Equipment (Details Textual) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Depreciation	$ 0.3	$ 0.4

Note 5 - Property and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Total property and equipment–at cost	$ 7,165	$ 7,165
Less: Accumulated depreciation	(6,573)	(6,267)
Property and equipment, net	592	898
Equipment [Member]
Total property and equipment–at cost	5,167	5,167
Leasehold Improvements [Member]
Total property and equipment–at cost	1,612	1,612
Software Development [Member]
Total property and equipment–at cost	364	364
Furniture and Fixtures [Member]
Total property and equipment–at cost	$ 22	$ 22

Note 6 - Accrued Expenses (Details Textual) $ in Millions	Jun. 30, 2024 USD ($)
Accrued Manufacturing Expenses	$ 4.6
Accrued Clinical Expenses	$ 4.5

Note 6 - Accrued Expenses - Schedule of Accrued Expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Project expenses	$ 4,605	$ 336
Compensation and benefits	2,314	1,938
Other	308	240
Total accrued expenses	$ 7,227	$ 2,514

Note 7 - Commitments and Contingencies (Details Textual) $ in Millions		3 Months Ended		6 Months Ended		9 Months Ended	54 Months Ended
	Jul. 01, 2023	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2024	Jun. 30, 2024	Jan. 01, 2021	Dec. 31, 2020
Number of Operating Leases									1
Lessee, Operating Lease, Term of Contract (Year)								4 years 5 months 1 day
Lessee, Operating Lease, Discount Rate								6.25%
Lessee, Operating Lease, Remaining Lease Term (Month)		11 months		11 months			11 months
Operating Lease, Payments		$ 0.3	$ 0.3	$ 0.7	$ 0.7
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	4.00%						4.00%
Defined Contribution Plan, Cost		$ 0.2	$ 0.1	$ 0.2	$ 0.1
Maximum [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay						6.00%

Note 7 - Commitments and Contingencies - Undiscounted Cash Flows Reconciled to Operating Lease Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Remainder of 2024	$ 575
2025	543
Total minimum lease payments	1,118
Less: amount of lease payments representing interest	(30)
Present value of future minimum lease payments	1,088
Less: operating lease obligations, current portion	(1,088)	$ (1,197)
Less: operating lease obligations, current portion	$ 0	$ 536

Note 8 - Stock-based Compensation (Details Textual) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions			6 Months Ended
	Jun. 30, 2024	Jan. 01, 2024	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2020
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 19,400		$ 19,400
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)			$ 1.82	$ 2.85
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value			$ 0
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount	11,400		11,400	$ 11,300
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value	0		$ 0	$ 600
Share-Based Payment Arrangement, Option [Member]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			1 year 6 months	3 years
Restricted Stock Units (RSUs) [Member]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 8,000		$ 8,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value			$ 884
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	1 year 9 months 18 days
The 2020 Stock Option and Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized					2.9
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized		5.1
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant	4.5		4.5
The 2020 Stock Option and Incentive Plan [Member] \| Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)			4 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)			10 years

Note 8 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Stock-based compensation expense	$ 2,121	$ 1,628	$ 4,124	$ 2,895
Research and Development Expense [Member]
Stock-based compensation expense	458	146	1,382	229
General and Administrative Expense [Member]
Stock-based compensation expense	$ 1,663	$ 1,482	$ 2,742	$ 2,666

Note 8 - Stock-based Compensation - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Outstanding, options (in shares)	7,876
Outstanding, weighted average exercise price (in dollars per share)	$ 3.81
Outstanding, weighted average remaining contractual term (Year)	8 years 1 month 28 days	8 years 18 days
Outstanding, aggregate intrinsic value	$ 0	$ 11
Granted, options (in shares)	3,453
Granted, weighted average exercise price (in dollars per share)	$ 1.82
Granted, weighted average remaining contractual term (Year)	9 years 6 months 18 days
Exercised, options (in shares)	0
Exercised, weighted average exercise price (in dollars per share)	$ 0
Forfeited/canceled, options (in shares)	0
Forfeited/canceled, weighted average exercise price (in dollars per share)	$ 0
Outstanding, options (in shares)	11,329	7,876
Outstanding, weighted average exercise price (in dollars per share)	$ 3.21	$ 3.81
Vested, options (in shares)	5,114
Vested, weighted average exercise price (in dollars per share)	$ 3.95
Vested, weighted average remaining contractual term (Year)	7 years 3 months 7 days
Vested, aggregate intrinsic value	$ 0		$ 600

Note 8 - Stock-based Compensation - Weighted Average Assumptions (Details)	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Expected term (in years) (Year)	6 years	6 years
Risk-free rate	4.04%	3.80%
Expected volatility	80.00%	88.00%

Note 8 - Stock-based Compensation - Summary of RSU Activity (Details) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2024 USD ($) $ / shares shares
Vested \| $	$ 0
Unvested, June 30, 2024 (in shares) \| shares	3,666
Unvested, June 30, 2024 (in dollars per share) \| $ / shares	$ 2.61
Unvested, June 30, 2024 \| $	$ 9,565
Restricted Stock Units (RSUs) [Member]
Unvested, December 31, 2023 (in shares) \| shares	1,500
Unvested, December 31, 2023 (in dollars per share) \| $ / shares	$ 3.89
Unvested, December 31, 2023 \| $	$ 5,835
Granted (in shares) \| shares	2,391
Granted (in dollars per share) \| $ / shares	$ 1.93
Granted \| $	$ 4,615
Vested (in shares) \| shares	225
Vested (in dollars per share) \| $ / shares	$ 3.93
Vested \| $	$ 884
Forfeited or canceled (in shares) \| shares	0
Forfeited or canceled (in dollars per share) \| $ / shares	$ 0

Note 10 - Other Income (Details Textual) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Investment Income, Interest	$ 2.0	$ 2.1	$ 4.0	$ 3.9

Note 11 - License, Research and Collaboration Agreements (Details Textual) - USD ($) $ in Thousands	1 Months Ended		6 Months Ended
	Apr. 30, 2024	Nov. 30, 2018	Jun. 30, 2024
ABL Bio Agreement [Member]
Upfront Payment		$ 5,000
Development Milestone Payment		6,000
Maximum Development and Regulatory Milestone Payments		96,000
ABL Bio Agreement [Member] \| Oncology [Member]
Maximum Commercial Milestone Payments and Royalties		303,000
ABL Bio Agreement [Member] \| Ophthalmology [Member]
Maximum Development and Regulatory Milestone Payments		75,000
Maximum Commercial Milestone Payments and Royalties		$ 110,000
Adimab Agreement [Member]
Milestone Payments Paid			$ 0
Milestone Payment Obligation			$ 2,000
Elpiscience Agreement [Member]
Milestone Payments Paid	$ 1,000
Sublicensing Revenue Percentage	15.00%
Sublicensing Revenue Obligation	$ 1,000

Note 12 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2024	Jun. 30, 2023
Proceeds from Issuance of Common Stock			$ 18,113	$ 3,126
At The Market [Member]
Stock Issued During Period, Shares, New Issues	0	9,790,577
Shares Issued, Price Per Share		$ 1.85
Proceeds from Issuance of Common Stock		$ 18,100
Proceeds from Issuance of Common Stock, Net		$ 17,600

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