Note 4 - Investments (Tables)

12 Months Ended

Dec. 31, 2025

Notes Tables

Marketable Securities [Table Text Block]

	December 31, 2025
					Cumulative
					Unrealized
	Fair Value		Basis		(Loss) Gain
Equity securities	$	36	$	34	$	2
Total	$	36	$	34	$	2

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

Investment Income [Table Text Block]

	Year Ended December 31,
	2025		2024
Interest on cash and cash equivalents	$	1,696	$	2,070
Dividends on marketable securities		1		1
Net investment income	$	1,697	$	2,071

Gain (Loss) on Securities [Table Text Block]

	Year Ended December 31,
	2025		2024
Marketable securities	$	19	$	(5	)
Net gains (losses)	$	19	$	(5	)