Note 13 - Capital Stock and Stock Compensation (Details Textual) - USD ($)						12 Months Ended
	Oct. 09, 2019	Jul. 23, 2019	Mar. 06, 2019	Nov. 30, 2018	Mar. 01, 2017	Nov. 30, 2019	Nov. 24, 2018	Nov. 25, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross						0	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Ending Balance				$ 8.02		$ 8.02	$ 8.02
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term				1 year 7 months 6 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value				$ 38,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares, Ending Balance						0
Payment, Tax Withholding, Share-based Payment Arrangement						$ (0)	$ 674,000	$ 641,000
Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount						22,000	$ 223,000	$ 554,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total						594,000
Share-based Payment Arrangement, Nonvested Award, Cost Expected to be Recognized Next Fiscal Year, Amount						$ 525,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition							2 years
Stock Issued During Period, Shares, Employee Stock Purchase Plans						23,460	14,967	6,275
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period						18,153
Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount						$ 0	$ 207,000	$ 366,000
Restricted Stock [Member] | Non-Employee Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			9,653,000			6,036
Restricted Stock [Member] | Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	3,500,000	5,000,000
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation							19,810	21,210
Payment, Tax Withholding, Share-based Payment Arrangement							$ 674,000	$ 641,000
The 2010 Plan [Member]
Common Stock, Capital Shares Reserved for Future Issuance						1,250,000
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent					85.00%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant						205,298