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Significant Accounting Policies (Details Textual)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
USD ($)
Segments
shares
Dec. 31, 2016
USD ($)
shares
Dec. 31, 2015
USD ($)
shares
Significant Accounting Policies (Textual)      
Inventory write-off $ 75 $ 92  
WACC 15.00%    
Long-term growth rate 2.00%    
Severance costs $ 451 240 $ 202
Allowance for doubtful accounts $ 27 $ 10 $ (85)
Number of operating segments | Segments 2    
Anti-dilutive securities | shares 314,125 283,670 404,894
Derivative liability $ 30 $ 32  
Material assumptions used for income approach period 5 years    
Income tax likelihood percentage, description The tax benefit as the largest amount which is more than 50% likely of being realized upon ultimate settlement.    
Fair value of goodwill $ 4,700