CONDENSED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Aug. 28, 2021	Aug. 29, 2020
CASH FLOWS FROM OPERATING ACTIVITES:
Net income	$ 2,080	$ 1,310
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation	290	285
Loss on disposal of equipment	232	23
Change in right of use of asset	23	24
Deferred tax	8	(5)
Changes in certain current assets and liabilities
Accounts receivable	(648)	(79)
Contract assets	(314)	(87)
Inventories	251	(1,939)
Prepaid expense and other assets	75	183
Prepaid income taxes	223	(223)
Accounts payable	664	133
Accrued compensation	107	(417)
Deferred revenue	32	(204)
Income taxes	202	19
Lease liabilities	(23)	(24)
Other accrued liabilities	82	(7)
Net cash provided by (used in) operating activities	3,307	(984)
CASH FLOWS FROM INVESTING ACTIVITIES:
Sale of short term investments	0	2,089
Additions to property, plant and equipment	(3,363)	(395)
Net cash (used in) provided by investing activities	(3,363)	1,694
CASH FLOWS FROM FINANCING ACTIVITIES
Cash dividend	(258)	(258)
Proceeds from long term debt	71	0
Proceeds from short term debt	0	1,924
Repayment of short term debt	0	(1,924)
Net cash used in financing activities	(187)	(258)
Net change in cash and cash equivalents	(243)	452
Cash and cash equivalents at beginning of period	14,619	13,890
Cash and cash equivalents at end of period	14,376	14,342
Supplemental Cash Flow Disclosure:
Cash paid for income taxes	247	436
Supplemental Non-Cash Flow Disclosure:
Accrued additions to property, plant and equipment	$ 624	$ 0