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Information Concerning Product Lines, Geographic Information and Revenue Concentration - Schedule of Revenue by Shipment Destination (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 28, 2020
Jun. 30, 2019
Jun. 28, 2020
Jun. 30, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]        
Total revenue $ 2,196 $ 2,087 $ 4,354 $ 5,281
Asia Pacific        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Total revenue 779 537 1,185 1,968
North America        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Total revenue 1,282 1,066 2,234 2,229
Europe        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Total revenue $ 135 $ 484 $ 935 $ 1,084