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Earnings Per Share (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Class A Common Stock [Member]          
Net Income (Loss) Available to Common Stockholders, Diluted [Abstract]          
Net Income (Loss) Available to Common Stockholders, Basic $ 647,000 $ 600,000 $ 434,000 $ 1,045,000  
Net Income (Loss) Available to Common Stockholders, Diluted $ 647,000 $ 600,000 $ 434,000 $ 1,045,000  
Weighted Average Number of Shares Outstanding, Diluted [Abstract]          
Common Shares Outstanding 12,631,627 12,632,000 12,631,627 12,632,000 12,631,627
Effect of Weighting 0 (1,000) 0 (22,000)  
Weighted Average Shares - Basic 12,701,627 12,709,127 12,701,627 12,687,836  
Weighted Average Shares - Diluted 12,701,627 12,709,127 12,701,627 12,687,836  
Income (Loss) Per Share - Basic $ 0.05 $ 0.05 $ 0.03 $ 0.08  
Income (Loss) Pe Share - Diluted $ 0.05 $ 0.05 $ 0.03 $ 0.08  
Class B Common Stock [Member]          
Net Income (Loss) Available to Common Stockholders, Diluted [Abstract]          
Net Income (Loss) Available to Common Stockholders, Basic $ 2,000 $ 2,000 $ 1,000 $ 3,000  
Net Income (Loss) Available to Common Stockholders, Diluted $ 2,000 $ 2,000 $ 1,000 $ 3,000  
Weighted Average Number of Shares Outstanding, Diluted [Abstract]          
Common Shares Outstanding 31,938 32,000 31,938 32,000 31,938
Weighted Average Shares - Basic 31,938 31,938 31,938 31,938  
Weighted Average Shares - Diluted 31,938 31,938 31,938 31,938  
Income (Loss) Per Share - Basic $ 0.05 $ 0.05 $ 0.03 $ 0.08  
Income (Loss) Pe Share - Diluted $ 0.05 $ 0.05 $ 0.03 $ 0.08