Note 4 - Balance Sheet Components (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

Property, Plant and Equipment [Table Text Block]

	March 31,			December 31,
	2024			2023
Leasehold improvements	$	2,519		$	2,519
Laboratory equipment		1,247			1,247
Furniture, fixtures and equipment		966			966
Software		272			272
Construction in progress		5			—
Total property and equipment		5,009			5,004
Less: Accumulated depreciation and amortization		(3,609	)		(3,476	)
Total property and equipment, net	$	1,400		$	1,528

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

	March 31,			December 31,
	2024			2023
Acquired patents and licenses	$	7,985		$	7,985
Less: Accumulated amortization		(6,266	)		(6,099	)
Total intangible assets, net	$	1,719		$	1,886

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

Years ending December 31:
2024 (remaining 9 months)	$	498
2025		665
2026		556
Total	$	1,719

Schedule of Accrued Liabilities [Table Text Block]

	March 31,		December 31,
	2024		2023
Compensation expense	$	1,783	$	3,199
Clinical trial fees and costs		56		84
Professional fees		232		343
Other		197		188
Total accrued expenses	$	2,268	$	3,814