Note 8 - Stockholders' Equity - Common Stock Outstanding (Details) - shares	12 Months Ended
	Nov. 27, 2021	Nov. 28, 2020	Nov. 30, 2019
Beginning balance (in shares)	51,906,663	51,241,190	50,732,796
Stock options exercised (in shares)	740,731	397,456	378,734
Deferred compensation paid (in shares)	19,895	118,742	5,354
Restricted units vested (in shares)	157,945	221,275	197,349
Shares withheld for taxes (in shares)	(47,481)	(72,000)	(73,043)
Ending balance (in shares)	52,777,753	51,906,663	51,241,190