Note 7 - Accounting for Share-based Compensation (Details Textual) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended	6 Months Ended
May 30, 2020	Jun. 01, 2019	May 30, 2020	Jun. 01, 2019
Fair Value Options Granted During Period Value Share-based Compensation	$ 116	$ 83	$ 10,077	$ 9,413
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	171	471	518	1,382
Proceeds, Issuance of Shares, Share-based Payment Arrangement, Including Option Exercised, Total	650	$ 771	1,557	$ 1,837
Total Fair Value of Nonvested Restricted Stock	$ 20,560		$ 20,560
Repurchased Restricted Stock Shares (in shares)	1,018	2,746	65,664	60,666
Share-based Payment Arrangement, Option [Member]
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount	$ 9,975		$ 9,975
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			10 months 24 days
Restricted Stock Units (RSUs) [Member]
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount	9,432		$ 9,432
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			1 year 2 months 12 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	175	$ 435	$ 9,842	$ 8,281
Selling, General and Administrative Expenses [Member]
Share-based Payment Arrangement, Expense	$ 4,533	$ 8,266	$ 9,236	$ 14,172

Fair value of options granted during the period.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Amount of cash inflow from issuance of shares under share-based payment arrangement. Includes, but is not limited to, option exercised.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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