Consolidated Statements of Stockholders' Equity - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Nov. 24, 2012	10,836,840
Balance at Nov. 24, 2012	$ 54,184,000		$ 104,319,000	$ (1,223,000)	$ 157,280,000
Comprehensive income
Net income			$ 5,096,000		5,096,000
Actuarial adjustment to SERP				$ (191,000)	(191,000)
Regular dividends ($0.22 per share)			$ (2,393,000)		(2,393,000)
Special dividend ($0.20 per share)			$ (2,172,000)		(2,172,000)
Issuance of common stock (in shares)	160,128
Issuance of common stock	$ 801,000	$ (104,000)			697,000
Purchase and retirement of common stock (in shares)	(137,650)
Purchase and retirement of common stock	$ (688,000)	(937,000)	$ (324,000)		(1,949,000)
Stock-based compensation		728,000			728,000
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation		$ 313,000			313,000
Balance (in shares) at Nov. 30, 2013	10,859,318
Balance at Nov. 30, 2013	$ 54,297,000		$ 104,526,000	$ (1,414,000)	157,409,000
Comprehensive income
Purchase and retirement of common stock	$ 688,000	$ 937,000	324,000		1,949,000
Net income			$ 9,299,000		9,299,000
Actuarial adjustment to SERP				$ (560,000)	(560,000)
Regular dividends ($0.22 per share)			$ (2,983,000)		(2,983,000)
Special dividend ($0.20 per share)			$ (2,102,000)		(2,102,000)
Issuance of common stock (in shares)	69,619
Issuance of common stock	$ 348,000	$ 260,000			608,000
Purchase and retirement of common stock (in shares)	(435,544)
Purchase and retirement of common stock	$ (2,178,000)	(1,511,000)	$ (2,401,000)		(6,090,000)
Stock-based compensation		951,000			951,000
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation		$ 300,000			$ 300,000
Balance (in shares) at Nov. 29, 2014	10,493,393				10,493,393
Balance at Nov. 29, 2014	$ 52,467,000		$ 106,339,000	$ (1,974,000)	$ 156,832,000
Comprehensive income
Purchase and retirement of common stock	$ 2,178,000	$ 1,511,000	2,401,000		6,090,000
Net income			$ 20,433,000		20,433,000
Actuarial adjustment to SERP				$ (704,000)	(704,000)
Regular dividends ($0.22 per share)			$ (3,684,000)		(3,684,000)
Special dividend ($0.20 per share)			$ (2,184,000)		(2,184,000)
Issuance of common stock (in shares)	503,814
Issuance of common stock	$ 2,519,000	$ 3,511,000			6,030,000
Purchase and retirement of common stock (in shares)	(81,186)
Purchase and retirement of common stock	$ 406,000	1,843,000			2,249,000
Stock-based compensation		894,000			894,000
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation		1,998,000			$ 1,998,000
Balance (in shares) at Nov. 28, 2015	10,916,021				10,916,021
Balance at Nov. 28, 2015	$ 54,580,000	4,560,000	$ 120,904,000	$ (2,678,000)	$ 177,366,000
Comprehensive income
Purchase and retirement of common stock	$ (406,000)	$ (1,843,000)			$ (2,249,000)