CONDENSED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Feb. 25, 2023	Feb. 26, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ (56)	$ 464
Adjustments to reconcile net income (loss) to
Depreciation	103	98
Amortization of right-of-use assets	14	13
Changes in certain current assets and liabilities:
Decrease in accounts receivable	834	1,490
Increase in contract assets	(314)	(189)
Increase in inventories	(1,051)	(168)
(Increase) decrease in prepaid expenses and other assets	(29)	61
(Decrease) increase in deferred revenue	(546)	181
Increase (decrease) in accounts payable	372	(8)
Decrease in accrued compensation	(244)	(451)
Decrease in income taxes payable	(124)	(42)
Decrease in lease liabilities	(14)	(13)
Decrease in all other accrued liabilities	(438)	(260)
Net cash provided by (used in) operating activities	(1,493)	1,176
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to property, plant and equipment	(480)	(5,281)
Net cash used in investing activities	(480)	(5,281)
CASH FLOWS FROM FINANCING ACTIVITIES
Cash dividend	(258)	(258)
Proceeds from long term debt	100	5,014
Net cash provided by (used in) financing activities	(158)	4,756
Net increase (decrease) in cash and cash equivalents	(2,131)	651
Cash and cash equivalents at beginning of period	15,375	15,252
Cash and cash equivalents at end of period	13,244	15,903
Supplemental Cash Flow Disclosure:
Cash paid for income taxes	118	137
Supplemental Non-Cash Flow Disclosure:
Changes in accrued property, plant and equipment	$ 75	$ (269)