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SCHEDULE OF SEGMENT REPORTING INFORMATION, BY SEGMENT (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 26, 2020
Sep. 28, 2019
Sep. 26, 2020
Sep. 28, 2019
Revenue from External Customer [Line Items]        
Total Revenues $ 9,513 $ 6,139 $ 26,206 $ 20,792
Defense [Member]        
Revenue from External Customer [Line Items]        
Total Revenues 4,769 1,968 12,772 5,207
Industrial [Member]        
Revenue from External Customer [Line Items]        
Total Revenues 1,650 2,625 5,229 7,262
Consumer [Member]        
Revenue from External Customer [Line Items]        
Total Revenues 68 360 521 1,510
Product and Service, Other [Member]        
Revenue from External Customer [Line Items]        
Total Revenues 2 553 25
Research and Development [Member]        
Revenue from External Customer [Line Items]        
Total Revenues 2,563 1,184 6,295 2,452
License And Royalties [Member]        
Revenue from External Customer [Line Items]        
Total Revenues $ 463 $ 836 $ 4,336