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Segment Information - Narrative (Details)
3 Months Ended 12 Months Ended
Jun. 27, 2020
USD ($)
Mar. 28, 2020
USD ($)
Dec. 31, 2022
USD ($)
segment
Jan. 01, 2022
USD ($)
Dec. 26, 2020
USD ($)
Segment Reporting Information          
Number of operating segments | segment     3    
Restructuring charges     $ 7,121,000 $ 2,158,000 $ 5,638,000
Impairments     $ 0 $ 0  
Net sales | Customer Concentration Risk | Arrow Electronics Inc.          
Segment Reporting Information          
Concentration risk (less than)     11.50% 10.70% 10.40%
Outside the United States | Net sales | Geographic Concentration Risk          
Segment Reporting Information          
Concentration risk (less than)     64.00% 69.00% 73.00%
China | Net sales | Geographic Concentration Risk          
Segment Reporting Information          
Concentration risk (less than)     25.00% 30.00% 30.00%
Employee terminations          
Segment Reporting Information          
Restructuring charges     $ 5,769,000 $ 1,875,000 $ 5,453,000
Other restructuring charges          
Segment Reporting Information          
Restructuring charges     $ 1,352,000 283,000 185,000
IXYS Corporation | Transportation          
Segment Reporting Information          
Other asset impairment charges   $ 2,200,000      
IXYS Corporation | Automotive Sensors | Transportation          
Segment Reporting Information          
Impairments $ 33,800,000        
IXYS Corporation | Employee terminations          
Segment Reporting Information          
Restructuring charges       2,200,000 $ 41,700,000
IXYS Corporation | Other restructuring charges          
Segment Reporting Information          
Restructuring charges   $ 200,000      
IXYS Corporation | Operating Income (Loss)          
Segment Reporting Information          
Legal, accounting and other expenses       $ 7,000,000