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Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 25, 2021	Dec. 26, 2020	Dec. 28, 2019
Revenue from External Customer [Line Items]
Total Revenues	$ 45,666	$ 40,128	$ 29,519
Defense [Member]
Revenue from External Customer [Line Items]
Total Revenues	18,180	20,231	8,729
Industrial [Member]
Revenue from External Customer [Line Items]
Total Revenues	9,710	6,882	9,717
Consumer [Member]
Revenue from External Customer [Line Items]
Total Revenues	1,871	852	1,777
Research and Development [Member]
Revenue from External Customer [Line Items]
Total Revenues	14,669	10,123	4,983
Other [Member]
Revenue from External Customer [Line Items]
Total Revenues	121	553	61
License and Royalties [Member]
Revenue from External Customer [Line Items]
Total Revenues	$ 1,115	$ 1,487	$ 4,252

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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