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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
 6 Months Ended
Jun. 30, 2019
Dec. 31, 2018
Preferred Stock, Par Value Per Share $ 1.00 $ 1.00
Preferred Stock, Shares Authorized 20,000,000 20,000,000
Accumulated Depreciation, Property, Plant, and Equipment $ 1,900,000 $ 1,600,000
Preferred Series B [Member]    
Preferred Stock, Dividend Rate, Percentage 7.50%  
Preferred Stock, Shares Issued 104,574 104,574
Preferred Stock, Liquidation Preference, Value $ 119,300,000 $ 111,500,000
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 8,051,307 7,632,669
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 1,406,082 1,406,082