Note 3 - Investment in Affiliate (Tables)

6 Months Ended

Jun. 30, 2023

Notes Tables

Equity Method Investments [Table Text Block]

	Ownership %						Investment in Affiliate Balance				Gain (loss) recorded in the Statements of Operations (b)
											For the Three Months Ended June 30,					For the Six Months Ended June 30,
	June 30, 2023			December 31, 2022			June 30, 2023		December 31, 2022		2023		2022			2023			2022
HC Series B Stock (a)		22.49	%		26.8	%	$	10,250	$	10,250	$	-	$	-		$	-		$	-
HC Common Stock		3.56	%		7.1	%		473		600		77		(96	)		(44	)		(189	)
Total		26.05	%		33.9	%	$	10,723	$	10,850	$	77	$	(96	)	$	(44	)	$	(189	)