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Note 4 - Investments (Tables)

9 Months Ended

Sep. 30, 2024

Notes Tables

Investment [Table Text Block]

		*September 30, 2024*								*December 31, 2023*
						*Cost/Amortized*								*Cost/Amortized*
		*Fair Value*				*Cost, Net*				*Fair Value*				*Cost, Net*
U.S. government and agency securities, held-to-maturity ⁽¹⁾		$	2,070			$	2,075			$	3,086			$	3,122
Investment in limited partnership, at net asset value ⁽²⁾			2,035				2,035				1,280				1,280
Total investments		$	4,105			$	4,110			$	4,366			$	4,402

		*September 30, 2024*
						*Gross*				*Gross*
		*Amortized*				*Unrealized*				*Unrealized*
		*Costs*				*Gains*				*Losses*				*Fair Value*
U.S. government and agency securities, held-to-maturity		$	2,075			$	-			$	(5	)		$	2,070

		*December 31, 2023*
						*Gross*				*Gross*
		*Amortized*				*Unrealized*				*Unrealized*
		*Costs*				*Gains*				*Losses*				*Fair Value*
U.S. government and agency securities, held-to-maturity		$	3,122			$	-			$	(36	)		$	3,086

Investments Classified by Contractual Maturity Date [Table Text Block]

		*Amortized*				*Percent of*								*Percent*
		*Cost*				*Total*				*Fair Value*				*of Total*
Due in one year or less		$	2,075				100.0	%		$	2,070				100.0	%
Total		$	2,075				100.0	%		$	2,070				100.0	%

Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]

		*September 30, 2024*
														*Total Fair*				*Carrying*
		*Level 1*				*Level 2*				*Level 3*				*Value*				Value ⁽¹⁾
U.S. government and agency securities, held-to-maturity		$	-			$	2,070			$	-			$	2,070			$	2,075

		*December 31, 2023*
														*Total Fair*				*Carrying*
		*Level 1*				*Level 2*				*Level 3*				*Value*				Value ⁽¹⁾
U.S. government and agency securities, held-to-maturity		$	-			$	3,086			$	-			$	3,086			$	3,122

Investment Income [Table Text Block]

		*For the Three Months Ended*								*For the Nine Months Ended*
		*September 30, 2024*				*September 30, 2023*				*September 30, 2024*				*September 30, 2023*

Interest on:
Cash equivalents		$	70			$	83			$	273			$	227
Fixed income securities			35				37				88				112
Dividends on investment in HC Series B Stock			-				256				256				769
Change in NAV of investment in limited partnership			222				214				273				214
Less: Investment expense			(2	)			(2	)			(4	)			(4	)
Net investment income		$	325			$	588			$	886			$	1,318