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Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Revenue from External Customer [Line Items]        
Revenues $ 16,032 $ 17,552 $ 39,603 $ 53,258
IC sales        
Revenue from External Customer [Line Items]        
Revenues 15,972 17,188 39,187 52,337
IC sales | Mobile Market        
Revenue from External Customer [Line Items]        
Revenues 8,237 5,738 18,158 18,519
IC sales | Home And Enterprise Market        
Revenue from External Customer [Line Items]        
Revenues 7,735 11,450 21,029 33,818
Engineering services, license and other        
Revenue from External Customer [Line Items]        
Revenues $ 60 $ 364 $ 416 $ 921