CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Preferred stock, authorized (in shares)	1,000,000	1,000,000
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	100,000,000	13,333,333
Common stock, issued (in shares)	5,931,582	5,931,582
Common stock, outstanding (in shares)	5,931,582	5,931,582
Series F Preferred Stock [Member]
Preferred stock, authorized (in shares)	520	520
Preferred stock, issued (in shares)	514.8	514.8
Preferred stock, outstanding (in shares)	514.8	514.8
Preferred stock, liquidation preference, value	$ 12,870	$ 12,870