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Fixed Assets (Details 1) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Lease cost:    
Operating lease cost $ 214,000 $ 186,000
Short-term lease cost 47,000 21,000
Total lease cost $ 261,000 207,000
Cash paid for amounts included in the measurement of lease liabilities:    
Operating cash flows from operating leases   $ 172,000
For operating lease:    
Weighted average remaining lease term (in years)   2 years 2 months 5 days
Weighted average discount rate   5.00%