Note 11 - Income Taxes - Reconciliation of Effective Income Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 28, 2020	Nov. 30, 2019	Dec. 01, 2018
Statutory U.S. federal income tax rate	$ 33,255	$ 36,294	$ 34,605
State income taxes, net of federal benefit	(2,104)	2,785	1,148
Foreign dividend repatriation	900	825	1,258
Foreign operations	(563)	8,712	(3,253)
Impact of option valuation	0	0	330
Executive compensation over $1.0 million	1,420	1,661	611
Change in valuation allowance	5,925	1,097	5,213
Research and development tax credit	(906)	(802)	(982)
Section 199 manufacturing deduction	0	0	(319)
Foreign-derived intangible income	(1,396)	(2,240)	0
Global intangible low-taxed income	1,932	2,029	0
Provision to return	1,704	(3,271)	(1,921)
Cross currency swap	(6,748)	2,677	0
Contingency reserve	8,287	(957)	1,943
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount	0	0	42,007
Dividends received deduction	0	0	(8,484)
Deferred tax rate change	0	0	(79,488)
Other	215	598	976
Total income tax expense (benefit)	$ 41,921	$ 49,408	$ (6,356)