Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Feb. 29, 2020	Feb. 23, 2019
CASH FLOWS FROM OPERATING ACTIVITES:
Net income (loss)	$ 692	$ (194)
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:
Depreciation	98	93
Change in right of use of asset	12
Changes in certain current assets and liabilities
Accounts receivable	(93)	1,321
Contract Assets	(345)	(40)
Inventories	(735)	(496)
Prepaid expense and other current assets	131	208
Prepaid income taxes		(36)
Deferred revenue	(148)	87
Accounts payable	(14)	67
Income taxes	105
Lease liabilities	(12)
Accrued compensation	(622)	(255)
Other accrued liabilities	(67)	(162)
Net cash (used in) provided by operating activities	(998)	593
CASH FLOWS FROM INVESTING ACTIVITIES:
Sale of short term investments	2,090	2,061
Purchase of short term investments	(1)	(2,068)
Additions to property, plant and equipment	(17)	(48)
Net cash provided by (used in) investing activities	2,072	(55)
CASH FLOWS FROM FINANCING ACTIVITIES
Cash dividend	(258)	(258)
Net cash used in financing activities	(258)	(258)
Net change in cash and cash equivalents	816	280
Cash and cash equivalents at beginning of period	13,890	10,483
Cash and cash equivalents at end of period	14,706	10,763
Supplemental Cash Flow Disclosure:
Cash paid for income taxes	$ 7	$ 5