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Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) - $ / shares
 3 Months Ended 12 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (in shares) 100,000 100,000
Preferred stock, shares issued (in shares) 329 329
Preferred stock, shares outstanding (in shares) 329 329
Preferred stock, dividend rate 8.875%  
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 70,000,000 70,000,000
Common stock, shares issued (in shares) 66,541,262 55,823,810
Common stock, shares outstanding (in shares) 66,541,262 55,823,810
Series A Preferred Stock [Member]    
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (in shares) 7,500 7,500
Preferred stock, shares issued (in shares) 2,300 2,300
Preferred stock, shares outstanding (in shares) 2,300 2,300
Preferred stock, dividend rate 8.875% 8.875%