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Related Party Transactions (Details) - USD ($)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2015
Apr. 18, 2017
Emmett J. Wood [Member]          
Related party transactions compensation [Abstract]          
Compensation to related parties   $ 158,000 $ 181,000    
Emmett J. Wood [Member] | Class A Common Stock [Member]          
Related party transactions compensation [Abstract]          
Number of shares held by related party (in shares)   810,000      
Emmett J. Wood [Member] | Class B Common Stock [Member]          
Related party transactions compensation [Abstract]          
Number of shares held by related party (in shares)   50,000      
Porter [Member]          
Related party transactions compensation [Abstract]          
Proceeds from related party, debt       $ 2,500,000  
Debt instrument, fixed interest rate 12.00%     12.00% 6.00%
Debt instrument, first interest payment due date   Aug. 20, 2015      
Debt instrument, last principal and interest payment date Jul. 01, 2017 Jul. 25, 2022      
Interest expense, related party   $ 80,000 $ 75,000    
Porter [Member] | Class A Common Stock [Member]          
Related party transactions compensation [Abstract]          
Percentage of shares owned 35.00%     35.00%