Note 2 - Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2025

Notes Tables

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

March 31, 2025	Level 1		Level 2		Level 3		Total
Money market securities	$	1,848	$	—	$	—	$	1,848
Commercial paper		—		10,340		—		10,340
U.S. treasuries		—		5,955		—		5,955
Federal agency notes		—		1,840		—		1,840
Total	$	1,848	$	18,135	$	—	$	19,983

December 31, 2024	Level 1		Level 2		Level 3		Total
Money market securities	$	112	$	—	$	—	$	112
Commercial paper		—		10,633		—		10,633
U.S. treasuries		—		9,192		—		9,192
Federal agency notes		—		5,317		—		5,317
Total	$	112	$	25,142	$	—	$	25,254

Investments Classified by Contractual Maturity Date [Table Text Block]

	Maturities by Period
			Less than		1-5		5-10		More than
	Total		1 year		years		years		10 years
Cash equivalents and marketable securities	$	19,983	$	19,983	$	—	$	—	$	—