Note 9 - Stockholders' Equity - Common Stock Outstanding (Details) - shares	12 Months Ended
	Nov. 28, 2015	Nov. 29, 2014	Nov. 30, 2013
Beginning balance (in shares)	50,310,803	50,228,543	49,903,266
Stock options exercised (in shares)	275,035	330,179	462,427
Shares swapped for stock option exercises (in shares)	(39,883)
Deferred compensation paid (in shares)	8,852	9,957	51,521
Restricted units vested (in shares)	83,494	69,624	67,828
Restricted shares granted (in shares)			186,352
Shares withheld for taxes (in shares)	(54,454)	(67,593)	(62,124)
Restricted shares forfeited (in shares)	(9,537)	(9,907)	(5,727)
Shares repurchased under repurchase program (in shares)	(500,000)	(250,000)	(375,000)
Ending balance (in shares)	50,074,310	50,310,803	50,228,543