Note 4 - Investments (Tables)

6 Months Ended

Jun. 30, 2024

Notes Tables

Marketable Securities [Table Text Block]

	June 30, 2024
					Cumulative
					Unrealized
	Fair Value		Basis		(Loss) Gain
Equity securities	$	18	$	34	$	(16	)
Total	$	18	$	34	$	(16	)

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

Investment Income [Table Text Block]

	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
Interest on cash and cash equivalents	$	538	$	275	$	1,037	$	473
Net investment income	$	538	$	275	$	1,037	$	473

Gain (Loss) on Securities [Table Text Block]

	Three Months Ended June 30,					Six Months Ended June 30,
	2024			2023		2024			2023
Marketable securities	$	(1	)	$	43	$	(4	)	$	388
Net (losses) gains	$	(1	)	$	43	$	(4	)	$	388