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Current Liabilities and Debt Obligations, Subordinated Debt (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2015
Sep. 30, 2018
Sep. 30, 2017
Mar. 31, 2015
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Apr. 18, 2017
Subordinated Debt [Abstract]                
Gain on extinguishment of subordinated debt         $ 0 $ 1,031,000    
Porter [Member]                
Subordinated Debt [Abstract]                
Related party ownership percentage 35.00%     35.00%        
Proceeds from related party, debt       $ 2,500,000        
Interest expense, related party   $ 78,000 $ 99,000   $ 229,000 $ 218,000    
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      
Gain on extinguishment of subordinated debt             $ 1,000,000