Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Feb. 26, 2022	Feb. 27, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 464	$ (301)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation	98	98
Deferred tax expense
Amortization of right-of-use assets	13	12
Changes in certain current assets and liabilities:
Decrease in accounts receivable	(1,490)	(1,072)
Increase in contract assets	(189)	(211)
Increase in inventories	168	735
Decrease in prepaid expenses and other assets	(61)	(166)
Increase in prepaid income taxes		71
Increase in deferred revenue	181	21
Decrease in accounts payable	(8)	(57)
Decrease in accrued compensation	(451)	(292)
Decrease in income taxes payable	(42)
Decrease in lease liabilities	(13)	(12)
Decrease in all other accrued liabilities	(260)	(44)
Net cash provided by (used in) operating activities	1,176	(354)
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to property, plant and equipment	5,281	677
Net cash used in investing activities	(5,281)	(677)
CASH FLOWS FROM FINANCING ACTIVITIES
Cash dividend	258	258
Proceeds from long term debt	5,014
Net cash provided by (used in) financing activities	4,756	(258)
Net increase (decrease) in cash and cash equivalents	651	(1,289)
Cash and cash equivalents at beginning of period	15,252	14,619
Cash and cash equivalents at end of period	15,903	13,330
Supplemental Cash Flow Disclosure:
Cash paid for income taxes	137	243
Supplemental Non-Cash Flow Disclosure:
Changes in accrued property, plant and equipment	$ (269)