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Fixed Assets - Lease costs (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Lease cost:        
Operating lease cost $ 58,000 $ 52,000 $ 175,000 $ 158,000
Total lease cost 58,000 52,000 175,000 $ 158,000
Cash paid for amounts included in the measurement of lease liabilities:        
Operating cash flows from operating leases   178,000    
Right-of-use assets obtained in exchange for new operating lease liabilities   $ 505,000    
For operating lease:        
Weighted average remaining lease term (in years)   3 years 4 months 2 days   3 years 4 months 2 days
Weighted average discount rate   7.17%   7.17%
Lease Two [Member]        
For operating lease:        
Right of use asset 505,000   505,000  
Operating lease liability $ 505,000   $ 505,000