Note 4 - Investments (Tables)

12 Months Ended

Dec. 31, 2024

Notes Tables

Marketable Securities [Table Text Block]

	December 31, 2024
					Cumulative
					Unrealized
	Fair Value		Basis		(Loss) Gain
Equity securities	$	17	$	34	$	(17	)
Total	$	17	$	34	$	(17	)

	December 31, 2023
					Cumulative
					Unrealized
	Fair Value		Basis		(Loss) Gain
Equity securities	$	22	$	34	$	(12	)
Total	$	22	$	34	$	(12	)

Investment Income [Table Text Block]

	Year Ended December 31,
	2024		2023
Interest on cash and cash equivalents	$	2,070	$	1,566
Dividends on marketable securities		1		—
Net investment income	$	2,071	$	1,566

Gain (Loss) on Securities [Table Text Block]

	Year Ended December 31,
	2024			2023
Marketable securities (a)	$	(5	)	$	384
Net (losses) gains	$	(5	)	$	384