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Fixed Assets (Details 1) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Lease cost:    
Operating lease cost $ 218,000 $ 214,000
Short-term lease cost 0 47,000
Total lease cost $ 218,000 261,000
Cash paid for amounts included in the measurement of lease liabilities:    
Operating cash flows from operating leases   $ 181,000
For operating lease:    
Weighted average remaining lease term (in years)   1 year 5 months 19 days
Weighted average discount rate   5.56%