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Business Segments, Concentration of Credit Risk and Significant Customers - Schedule of Revenue from Shipment of Product and Licensing of its Technologies to Customers by Geographical Location (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Business Segments        
Total net revenue $ 1,168 $ 1,968 $ 2,506 $ 3,228
North America [Member]        
Business Segments        
Total net revenue 971 1,807 1,919 2,618
Japan [Member]        
Business Segments        
Total net revenue   14 274 250
Taiwan [Member]        
Business Segments        
Total net revenue 118 108 196 247
Rest of world [Member]        
Business Segments        
Total net revenue $ 79 $ 39 $ 117 $ 113