Note 4 - Balance Sheet Components (Tables)

6 Months Ended

Jun. 30, 2024

Notes Tables

Cash, Cash Equivalents and Investments [Table Text Block]

	Amortized		Gross Unrealized					Estimated		Cash and Cash		Short-Term
	Cost		Gains		Losses			Fair Value		Equivalents		Investments
June 30, 2024
Cash at banks	$	5,285	$	—	$	—		$	5,285	$	5,285	$	—
Money market funds		38,000		—		—			38,000		38,000		—
U.S. Treasury securities		19,324		—		(16	)		19,308		—		19,308
Total	$	62,609	$	—	$	(16	)	$	62,593	$	43,285	$	19,308

	Amortized		Gross Unrealized					Estimated		Cash and Cash		Short-Term
	Cost		Gains		Losses			Fair Value		Equivalents		Investments
December 31, 2023
Cash at banks	$	3,352	$	—	$	—		$	3,352	$	3,352	$	—
Money market funds		31,403		—		—			31,403		31,403		—
U.S. Treasury securities		4,959		—		(1	)		4,958		—		4,958
Total	$	39,714	$	—	$	(1	)	$	39,713	$	34,755	$	4,958

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]

	June 30, 2024		December 31, 2023
Prepaid clinical and manufacturing expenses	$	2,218	$	984
Prepaid insurance		734		258
Prepaid rent		—		488
Other prepaid		885		752
Other current assets		328		333
Prepaid expenses and other current assets	$	4,165	$	2,815

Property, Plant and Equipment [Table Text Block]

	June 30, 2024			December 31, 2023
Laboratory equipment	$	13,554		$	13,448
Office and computer equipment		1,120			1,105
Leasehold improvements		4,078			3,985
Construction in progress		191			24
Total property and equipment		18,943			18,562
Less: accumulated depreciation		(8,663	)		(6,831	)
Property and equipment, net	$	10,280		$	11,731

Schedule of Finite-Lived Intangible Assets [Table Text Block]

	June 30, 2024			December 31, 2023
Developed technology	$	5,000		$	5,000
Intellectual property		80			80
Total cost		5,080			5,080
Less: accumulated amortization		(1,157	)		(791	)
Intangible assets, net	$	3,923		$	4,289

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Year Ending December 31,	Amount
2024 (six months remaining)	$	365
2025		732
2026		731
2027		731
2028		727
Thereafter		637
Total	$	3,923

Schedule of Accrued Liabilities [Table Text Block]

	June 30, 2024		December 31, 2023
Accrued compensation	$	3,704	$	4,576
Accrued clinical and manufacturing expenses		1,591		312
Accrued professional and consulting services		522		211
Other liabilities, current portion		794		535
Total	$	6,611	$	5,634