Note 9 - Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2025

Fair Value Disclosures [Abstract]

Summary of Cash Equivalents and Short-term Investments Measured at Fair Value on Recurring Basis

Below is the summary of our cash equivalents and short-term investments measured at fair value on a recurring basis and categorized using the fair value hierarchy (in thousands):

	December 31, 2025
	Level 1		Level 2		Total
Cash equivalents
Money market fund	$	24,134	$	-	$	24,134
Commercial paper		-		2,488		2,488
Corporate debt securities		-		826		826
Total cash equivalents		24,134		3,314		27,448
Available-for-sale securities
Securities of U.S. government and government   agencies		-		30,010		30,010
Commercial paper		-		19,499		19,499
Certificates of deposit		-		1,721		1,721
Corporate debt securities		-		56,960		56,960
Asset-backed securities		-		5,918		5,918
Total available-for-sale securities		-		114,108		114,108
Total cash equivalents and available-for-sale   securities	$	24,134	$	117,422	$	141,556

	December 31, 2024
	Level 1		Level 2		Total
Cash equivalents
Money market fund	$	46,079	$	-	$	46,079
Corporate debt securities		-		9,663		9,663
Securities of U.S. government and government   agencies		-		3,978		3,978
Total cash equivalents		46,079		13,641		59,720
Available-for-sale securities
Securities of U.S. government and government   agencies		-		51,500		51,500
Commercial paper		-		44,473		44,473
Corporate debt securities		-		64,570		64,570
Asset-backed securities		-		4,793		4,793
Total available-for-sale securities		-		165,336		165,336
Total cash equivalents and available-for-sale   securities	$	46,079	$	178,977	$	225,056