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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
 3 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Preferred Stock, Par Value Per Share $ 1.00 $ 1.00
Preferred Stock, Shares Authorized 20,000,000 20,000,000
Common Stock, Par or Stated Value Per Share $ 0.10  
Accumulated Depreciation, Property, Plant, and Equipment $ 2,800,000 $ 2,700,000
Preferred Series B [Member]    
Preferred Stock, Dividend Rate, Percentage 7.50%  
Preferred Stock, Shares Issued 37,847 41,720
Preferred Stock, Liquidation Preference, Value $ 49,600,000 $ 53,900,000
Common Class A [Member]    
Common Stock, Par or Stated Value Per Share $ 0.10 $ 0.10
Common Stock, Shares Authorized 70,000,000 70,000,000
Common Stock, Shares, Issued 12,764,578 11,390,189
Common Class B [Member]    
Common Stock, Par or Stated Value Per Share $ 0.10 $ 0.10
Common Stock, Shares Authorized 30,000,000 30,000,000
Common Stock, Shares, Issued 719,200 719,200