Note 9 - Stockholders' Equity - Common Stock Outstanding (Details) - shares	12 Months Ended
	Dec. 03, 2016	Nov. 28, 2015	Nov. 29, 2014
Beginning balance (in shares)	50,074,310	50,310,803	50,228,543
Stock options exercised (in shares)	593,891	275,035	330,179
Shares swapped for stock option exercises (in shares)	(71,659)	(39,883)
Deferred compensation paid (in shares)	7,235	8,852	9,957
Restricted units vested (in shares)	105,552	83,494	69,624
Shares withheld for taxes (in shares)	(67,807)	(54,454)	(67,593)
Restricted shares forfeited (in shares)	(179)	(9,537)	(9,907)
Shares repurchased under repurchase program (in shares)	(500,000)	(500,000)	(250,000)
Ending balance (in shares)	50,141,343	50,074,310	50,310,803