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Consolidated Balance Sheets (Parentheticals) - $ / shares
Dec. 31, 2022
Dec. 31, 2021
Preferred Stock, Par or Stated Value Per Share (in dollars per share) $ 0.01 $ 0.01
Preferred Stock, Shares Authorized (in shares) 975,150 975,150
Preferred Stock, Shares Issued (in shares) 0 0
Treasury Stock, Shares, Total (in shares) 19 19
Series A Preferred Stock [Member]    
Preferred Stock, Par or Stated Value Per Share (in dollars per share) $ 0.01 $ 0.01
Preferred Stock, Shares Authorized (in shares) 24,850 24,850
Preferred Stock, Shares Issued (in shares) 0 0
Nonvoting Common Stock [Member]    
Common Stock, Par or Stated Value Per Share (in dollars per share) $ 0.01 $ 0.01
Common Stock, Shares Authorized (in shares) 10,000,000 10,000,000
Common Stock, Shares, Issued (in shares) 0 0
Common Stock [Member]    
Common Stock, Par or Stated Value Per Share (in dollars per share) $ 0.01 $ 0.01
Common Stock, Shares Authorized (in shares) 30,000,000 30,000,000
Common Stock, Shares, Issued (in shares) 22,175,664 21,864,743
Common Stock, Shares, Outstanding, Ending Balance (in shares) 22,175,645 21,864,724