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Consolidated Statements of Stockholders' Equity (Deficit) (Parentheticals) - $ / shares
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Series A Preferred Stock [Member]    
Preferred stock, dividend rate 8.875% 8.875%
Preferred stock, dividend rate 8.857% 8.857%
Dividends declared (in dollars per share) $ 2,220 $ 1,190