Note 7 - Investments (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

Marketable Securities [Table Text Block]

	Amortized		Unrealized		Unrealized
	Cost Basis		Gains		Losses			Fair Value
Assets:
Cash equivalents
Money market funds	$	2,569	$	—	$	—		$	2,569
U.S. government		11,305		—		(1	)		11,304
Commercial paper		12,567		—		(1	)		12,566
Total cash equivalents		26,441		—		(2	)		26,439
Marketable securities:
U.S. government		24,025		—		(1	)		24,024
Corporate bonds		6,356		22		—			6,378
Commercial paper		2,879		2		—			2,881
Certificates of deposit		4,089		2		—			4,091
Total marketable securities		37,349		26		(1	)		37,374
Total assets at fair value	$	63,790	$	26	$	(3	)	$	63,813

Investments Classified by Contractual Maturity Date [Table Text Block]

	September 30,		December 31,
	2025		2024
Maturities within one year	$	63,433	$	105,706
Maturities after one year through three years		380		5,022
Total investments	$	63,813	$	110,728