Note 2 - Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2024

Notes Tables

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

	Fair Value Measured as of December 31, 2024 Using:
							Cash and
	Adjusted		Unrealized		Fair		Cash		Marketable
	Cost		gains		Value		Equivalent		Securities
Assets
Level 1
Money market funds	$	5,823	$	—	$	5,823	$	5,823	$	—
Level 2
Corporate bonds		9,660		4		9,664		—		9,664
Commercial paper		945		—		945		—		945
U.S. Government securities		1,402		1		1,403		—		1,403
Total financial assets	$	17,830	$	5	$	17,835	$	5,823	$	12,012
Liabilities
Level 2
Private placement warrant liability	$	—	$	—	$	—	$	—	$	—
Level 3
Derivative warrant liability		—		—		26		—		—
Total financial liabilities	$	—	$	—	$	26	$	—	$	—

	Fair Value Measured as of December 31, 2023 Using:
							Cash and
	Adjusted		Unrealized		Fair		Cash		Marketable
	Cost		gains		Value		Equivalent		Securities
Assets
Level 1
Money market funds	$	16,377	$	—	$	16,377	$	16,377	$	—
Level 2
Corporate bonds		2,880		1		2,881		—		2,881
Commercial paper		8,809		5		8,814		—		8,814
U.S. Government securities		7,892		4		7,896		—		7,896
Total financial assets	$	35,958	$	10	$	35,968	$	16,377	$	19,591
Liabilities
Level 2
Private placement warrant liability	$	—	$	—	$	—	$	—	$	—
Level 3
Derivative warrant liability		—		—		26		—		—
Total financial liabilities	$	—	$	—	$	26	$	—	$	—