Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) $ / shares in Thousands	Dec. 31, 2021	Dec. 31, 2020
Mezzanine equity, par value (in dollars per share)	$ 0	$ 0
Mezzanine equity, shares authorized (in shares)	170,000	170,000
Mezzanine equity, shares issued (in shares)	170,000	170,000
Mezzanine equity, shares outstanding (in shares)	170,000	170,000
Mezzanine equity, liquidation preference	$ 5,000,000	$ 5,000,000
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	5,930,408	5,827,304
Common stock, shares outstanding (in shares)	5,886,750	5,783,646
Treasury stock, shares (in shares)	43,658	43,658
Series A Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	3,000,000	3,000,000
Preferred stock, shares issued (in shares)	500,000	500,000
Preferred stock, shares outstanding (in shares)	500,000	500,000
Preferred stock, liquidation preference	$ 5,000,000	$ 5,000,000
Series B Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	170,000	170,000
Preferred stock, shares issued (in shares)	170,000	170,000
Preferred stock, shares outstanding (in shares)	170,000	170,000
Preferred stock, liquidation preference	$ 1,700,000	$ 1,700,000
Series C Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	170,000	170,000
Preferred stock, shares issued (in shares)	170,000	170,000
Preferred stock, shares outstanding (in shares)	170,000	170,000
Preferred stock, liquidation preference	$ 1,700,000	$ 1,700,000
Series D Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	170,000
Preferred stock, shares issued (in shares)	170,000	170,000
Preferred stock, shares outstanding (in shares)	170,000	170,000
Preferred stock, liquidation preference	$ 1,700,000	$ 1,700,000

Face amount per share of no-par value common stock.

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