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Leases (Narrative) (Details) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2019
Dec. 31, 2018
Dec. 31, 2017
Leases [Abstract]      
Operating lease expense $ 227,853    
Operating lease, payments $ 240,846    
Remaining lease term 6 years 1 month 6 days    
Discount rate lease liability 12.00%    
Other rent related expenses   $ 400,000 $ 500,000