CONDENSED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Aug. 29, 2015	Aug. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 1,123	$ 863
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	231	238
Deferred tax expense	70	127
Changes in certain current assets and liabilities
(Increase) decrease in accounts receivable	(29)	438
(Increase) decrease in inventories	(1,572)	705
Decrease (increase) in prepaid expense and other current assets	29	(249)
Decrease in prepaid income taxes	210	0
Increase (decrease) in deferred revenue	3,111	(453)
Decrease in accounts payable	(121)	(128)
Decrease in accrued compensation	(14)	(72)
Decrease in other accrued liabilities	(13)	(10)
Increase (decrease) in income taxes payable	87	(33)
Net cash provided by operating activities	3,112	1,426
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from maturity of short-term investments	4,011	4,011
Purchase of short-term investments	(4,005)	(4,013)
Additions to property, plant and equipment	(351)	(223)
Net cash used in investing activities	(345)	(225)
CASH FLOWS FROM FINANCING ACTIVITIES
Cash dividend	(258)	(258)
Net cash used in financing activities	(258)	(258)
Net change in cash and cash equivalents	2,509	943
Cash and cash equivalents at beginning of period	9,994	9,263
Cash and cash equivalents at end of period	12,503	10,206
Supplemental Cash Flow Disclosure:
Cash paid for income taxes	363	596
Supplemental Non-Cash Investing Activity:
Accrued additions to equipment	$ (21)	$ 0