Note 3 - Investment in Affiliate (Tables)

3 Months Ended

Mar. 31, 2023

Notes Tables

Equity Method Investments [Table Text Block]

	Ownership %						Investment in Affiliate Balance				Loss recorded in the Statements of Operations (b)
											For the Three Months Ended March 31,
	March 31, 2023			December 31, 2022			March 31, 2023		December 31, 2022		2023			2022
HC Series B Stock (a)		26.8	%		26.8	%	$	10,250	$	10,250	$	-			-
HC Common Stock		7.1	%		7.1	%		438		600		(121	)		(93	)
Total		33.9	%		33.9	%	$	10,688	$	10,850	$	(121	)	$	(93	)