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Schedule of Segment Reporting Information, by Segment (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 25, 2021
Dec. 26, 2020
Revenue from External Customer [Line Items]      
Total Revenues $ 47,401 $ 45,666 $ 40,128
Defense [Member]      
Revenue from External Customer [Line Items]      
Total Revenues 24,780 18,180 20,231
Industrial [Member]      
Revenue from External Customer [Line Items]      
Total Revenues 6,136 9,710 6,882
Consumer [Member]      
Revenue from External Customer [Line Items]      
Total Revenues 1,497 1,871 852
Research And Development [Member]      
Revenue from External Customer [Line Items]      
Total Revenues 14,357 14,669 10,123
License And Royalties [Member]      
Revenue from External Customer [Line Items]      
Total Revenues 624 1,115 1,487
Other [Member]      
Revenue from External Customer [Line Items]      
Total Revenues $ 7 $ 121 $ 553