CONDENSED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Aug. 27, 2022	Aug. 28, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 2,060	$ 2,080
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	297	290
Loss on disposal of equipment	0	232
Deferred tax expense	4	8
Amortization of right-of-use assets	40	37
Changes in certain current assets and liabilities:
Decrease (increase) in accounts receivable	443	(648)
Increase in contract assets	(309)	(314)
Decrease (increase) in inventories	(884)	251
Increase (decrease) in prepaid expenses	(387)	75
Increase in prepaid income taxes		223
(Decrease) increase in deferred revenue	(103)	32
Increase in accounts payable	328	664
(Decrease) increase in accrued compensation	(189)	107
Increase in income taxes payable	224	202
Decrease in lease liabilities	(40)	(37)
Increase in all other accrued liabilities	65	105
Net cash provided by operating activities	1,549	3,307
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to property, plant and equipment	(11,931)	(3,363)
Net cash used in investing activities	(11,931)	(3,363)
CASH FLOWS FROM FINANCING ACTIVITIES
Cash dividend	(258)	(258)
Proceeds from long term debt	10,990	71
Net cash provided by (used in) financing activities	10,732	(187)
Net increase (decrease) in cash and cash equivalents	350	(243)
Cash and cash equivalents at beginning of period	15,252	14,619
Cash and cash equivalents at end of period	15,602	14,376
Supplemental Cash Flow Disclosure:
Cash paid for income taxes	302	247
Supplemental Non-Cash Flow Disclosure:
Changes in accrued property, plant, and equipment	$ 402	$ 624