Note 6 - Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

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

			Fair Value Measurements Using
			Quoted Prices		Significant
			in Active		Other
	Balance as of		Markets for		Observable
	September 30,		Identical Assets		Inputs
	2025		(Level 1)		(Level 2)
Assets:
Cash equivalents
Money market funds	$	2,569	$	2,569	$	—
U.S. government		11,304		11,304		—
Commercial paper		12,566		—		12,566
Total cash equivalents		26,439		13,873		12,566
Marketable securities
U.S. government		24,024		24,024		—
Corporate bonds		6,378		—		6,378
Commercial paper		2,881		—		2,881
Certificates of deposit		4,091		—		4,091
Total marketable securities		37,374		24,024		13,350
Total assets at fair value	$	63,813	$	37,897	$	25,916

			Fair Value Measurements Using
			Quoted Prices		Significant
			in Active		Other
	Balance as of		Markets for		Observable
	December 31,		Identical Assets		Inputs
	2024		(Level 1)		(Level 2)
Assets:
Cash equivalents
Money market funds	$	41,008	$	41,008	$	—
Marketable securities
U.S. government		26,053		26,053		—
Corporate bonds		14,980		—		14,980
Commercial paper		26,622		—		26,622
Certificates of deposit		2,065		—		2,065
Total marketable securities		69,720		26,053		43,667
Total assets at fair value	$	110,728	$	67,061	$	43,667