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Business Combination (Details Textual) - USD ($)
$ in Thousands, shares in Millions
3 Months Ended 12 Months Ended
Apr. 28, 2017
Mar. 31, 2017
Dec. 31, 2017
Mar. 31, 2018
Jan. 01, 2018
Business Acquisition [Line Items]          
Amount of payment $ 1,000        
Inventory, Net     $ 32,228 $ 37,485 $ 31,798
Nesscap          
Business Acquisition [Line Items]          
Value of share consideration 25,294        
Amount of payment 1,006        
Fair value of intangible assets acquired 11,800        
Nesscap | Fair Value Adjustment to Inventory          
Business Acquisition [Line Items]          
Fair market value step-up $ 686        
Component of cost of revenue     $ 600    
Common Stock | Nesscap          
Business Acquisition [Line Items]          
Number of shares issued 25.3        
Value of share consideration $ 4,100        
Percentage of outstanding shares 11.30%        
Selling, general and administrative | Nesscap          
Business Acquisition [Line Items]          
Acquisition related costs   $ (300)      
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606          
Business Acquisition [Line Items]          
Inventory, Net         (430)
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606 | Nesscap | Fair Value Adjustment to Inventory          
Business Acquisition [Line Items]          
Inventory, Net         $ 40