Note 5 - Investments - Net Investment Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Investment income	$ 124	$ 138	$ 156	$ 561
Less: Investment expense	(1)	(1)	(1)	(2)
Cash and Cash Equivalents [Member]
Investment income	90	100	183	203
Fixed Income Securities [Member]
Investment income	0	24	1	53
Series B Cumulative Convertible Preferred Stock [Member] \| HC Government Realty Trust, Inc [Member]
Dividends on investment in HC Series B Stock	0	0	0	256
Partnership [Member]
Investment income	$ 35	$ 15	$ (27)	$ 51

Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.