Note 7 - Stockholders' Equity - Common Stock Outstanding (Details) - shares	12 Months Ended
	Dec. 01, 2018	Dec. 02, 2017	Dec. 03, 2016
Beginning balance (in shares)	50,388,839	50,141,343	50,074,310
Stock options exercised (in shares)	198,849	514,064	593,891
Shares swapped for stock option exercises (in shares)			(71,659)
Deferred compensation paid (in shares)	7,152	24,048	7,235
Restricted units vested (in shares)	209,137	140,614	105,552
Shares withheld for taxes (in shares)	(71,181)	(56,230)	(67,807)
Restricted shares forfeited (in shares)			(179)
Shares repurchased under repurchase program (in shares)		(375,000)	(500,000)
Ending balance (in shares)	50,732,796	50,388,839	50,141,343