Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Details Textual)

v3.10.0.1
Summary of Significant Accounting Policies (Details Textual) - 9 months ended Sep. 29, 2018
$ in Thousands
EUR (€)
USD ($)
Summary Of Significant Accounting Policies [Line Items]    
Contract asset, current   $ 2,553
Contract Liabilities, current   $ 150
Term of revenue recognition   1 year
Maximum advance from factoring agreement of accounts receivable | € € 1,000,000  
Custom Products [Member] | Minimum [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Contract period for sale of product 3 months  
Custom Products [Member] | Maximum [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Percentage of revenue 3.00%  
Contract period for sale of product 1 year  
Various Services [Member] | Minimum [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Service contracts period 3 months  
Various Services [Member] | Maximum [Member]    
Summary Of Significant Accounting Policies [Line Items]    
Percentage of revenue 3.00%  
Service contracts period 1 year