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Business Segment, Concentration of Credit Risk and Significant Customers - Schedule of Revenue from Licensing Technologies, Performance of Engineering Services and Shipment of Products to Customers by Geographical Locations (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Business Segments    
Total net revenue $ 5,679 $ 9,090
North America [Member]    
Business Segments    
Total net revenue 1,968 7,727
Hong Kong [Member]    
Business Segments    
Total net revenue 2,955  
Taiwan [Member]    
Business Segments    
Total net revenue 693 1,351
Rest of world [Member]    
Business Segments    
Total net revenue $ 63 $ 12