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Business Combination (Details Textual) - USD ($)
$ in Thousands, shares in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Apr. 28, 2017
Sep. 30, 2017
Sep. 30, 2017
Dec. 31, 2017
Sep. 30, 2018
Jan. 01, 2018
Business Acquisition [Line Items]            
Amount of payment $ 1,000          
Inventory, Net       $ 32,228 $ 39,621 $ 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       $ 646    
Common Stock | Nesscap            
Business Acquisition [Line Items]            
Value of share consideration $ 4,100          
Number of shares issued 25.3          
Percentage of outstanding shares 11.30%          
Selling, general and administrative | Nesscap            
Business Acquisition [Line Items]            
Acquisition related costs   $ 0 $ (1,800)      
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