CONDENSED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Aug. 25, 2018	Aug. 26, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 753	$ 678
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	236	217
Deferred tax	86	6
Changes in certain current assets and liabilities
Accounts receivable	757	190
Inventories	(699)	1,003
Prepaid expense and other current assets	(147)	(108)
Prepaid income taxes	(259)	87
Deferred revenue	244	(859)
Accounts payable	241	(154)
Accrued compensation	(144)	56
Other accrued liabilities	(89)	(55)
Net cash provided by operating activities	979	1,061
CASH FLOWS FROM INVESTING ACTIVITIES:
Sale of short term investments	4,082	4,036
Purchase of short term investments	(4,104)	(4,047)
Additions to property, plant and equipment	(248)	(407)
Net cash used in investing activities	(270)	(418)
CASH FLOWS FROM FINANCING ACTIVITIES
Cash dividend	(258)	(258)
Net cash used in financing activities	(258)	(258)
Net change in cash and cash equivalents	451	385
Cash and cash equivalents at beginning of period	9,388	10,012
Cash and cash equivalents at end of period	9,839	10,397
Supplemental Cash Flow Disclosure:
Cash paid for income taxes	$ 16	$ 17