Note 4 - Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2026

Notes Tables

Debt Securities, Available-for-Sale [Table Text Block]

		September 30, 2026							December 31, 2025
	Fair Value Level1	Adjusted Cost		Gross Unrealized Losses			Fair Value		Adjusted Cost		Gross Unrealized Losses			Fair Value
Money market funds	Level 1	$	1,320	$	—		$	1,320	$	581	$	—		$	581
Municipal debt securities	Level 2		2,370		(1	)		2,369		4,893		(1	)		4,892
Corporate debt securities	Level 2		10,200		(9	)		10,191		17,513		(9	)		17,504
Total investments		$	13,890	$	(10	)	$	13,880	$	22,987	$	(10	)	$	22,977