Note 4 - Investments (Tables)

3 Months Ended

Mar. 31, 2025

Notes Tables

Marketable Securities [Table Text Block]

	March 31, 2025
					Cumulative
					Unrealized
	Fair Value		Basis		Loss
Equity securities	$	20	$	34	$	(14	)
Total	$	20	$	34	$	(14	)

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

Investment Income [Table Text Block]

	Three Months Ended March 31,
	2025		2024
Interest on cash and cash equivalents	$	417	$	499
Net investment income	$	417	$	499

Gain (Loss) on Securities [Table Text Block]

	Three Months Ended March 31,
	2025		2024
Marketable securities	$	3	$	(3	)
Net gains (losses)	$	3	$	(3	)