Net Sales by Major Market (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 28, 2021	Aug. 29, 2020	Aug. 28, 2021	Aug. 29, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Domestic Direct	$ 5,241	$ 3,602	$ 12,418	$ 9,780
Domestic Distribution	2,718	1,109	6,886	5,965
International	221	215	561	1,015
	8,180	4,926	19,865	16,670
Military [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Domestic Direct	3,052	2,789	7,063	5,412
Domestic Distribution	2,427	881	5,762	5,444
International	25	72	152	377
	5,504	3,742	12,977	11,233
Space [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Domestic Direct	971	261	2,141	1,509
Domestic Distribution	139	2	675	84
International	120	123	255	581
	1,230	466	3,071	2,174
Medical [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Domestic Direct	1,069	404	2,777	2,218
Domestic Distribution		15		28
International
	1,069	419	2,777	2,246
Commercial [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Domestic Direct	149	148	437	641
Domestic Distribution	152	131	449	409
International	76	20	154	57
	$ 377	$ 299	$ 1,040	$ 1,107