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Note 11 - Income Taxes (Details) (USD $)
 12 Months Ended
Nov. 29, 2014
Nov. 30, 2013
Nov. 24, 2012
Nov. 26, 2011
Note 11 - Income Taxes (Details) [Line Items]        
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation $ 300,000us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation $ 313,000us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation    
Years Company Remained in Cumulative Loss Position       3 years
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount 974,000us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount (136,000)us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount 18,704,000us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount 17,464us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Effect of Change in Deferred Tax Assets Valuation Allowance on Basic Earnings Per Share (in Dollars per share) $ 0.09bset_EffectOfChangeInDeferredTaxAssetsValuationAllowanceOnBasicEarningsPerShare   $ 1.70bset_EffectOfChangeInDeferredTaxAssetsValuationAllowanceOnBasicEarningsPerShare  
Effect of Change in Deferred Tax Assets Valuation Allowance on Diluted Earnings Per Share (in Dollars per share)     $ 1.69bset_EffectOfChangeInDeferredTaxAssetsValuationAllowanceOnDilutedEarningsPerShare  
Deferred Tax Assets, Valuation Allowance 70,000us-gaap_DeferredTaxAssetsValuationAllowance 1,044,000us-gaap_DeferredTaxAssetsValuationAllowance    
Income Taxes Paid, Net 2,367,000us-gaap_IncomeTaxesPaidNet 2,723,000us-gaap_IncomeTaxesPaidNet 2,010,000us-gaap_IncomeTaxesPaidNet  
Unrecognized Tax Benefits, Excluding Interest and Penalties 1,236,000bset_UnrecognizedTaxBenefitsExcludingInterestAndPenalties 1,497,000bset_UnrecognizedTaxBenefitsExcludingInterestAndPenalties    
Unrecognized Tax Benefits that Would Impact Effective Tax Rate   239,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate    
Unrecognized Tax Benefits Interest Expense Recovery 7,000bset_UnrecognizedTaxBenefitsInterestExpenseRecovery 23,000bset_UnrecognizedTaxBenefitsInterestExpenseRecovery 63,000bset_UnrecognizedTaxBenefitsInterestExpenseRecovery  
Unrecognized Tax Benefits Income Tax Penalties Expense Recovery 10,000bset_UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpenseRecovery 31,000bset_UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpenseRecovery 57,000bset_UnrecognizedTaxBenefitsIncomeTaxPenaltiesExpenseRecovery  
Unrecognized Tax Benefits, Interest on Income Taxes Accrued 134,000us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued 140,000us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued    
Unrecognized Tax Benefits, Income Tax Penalties Accrued 0us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued 10,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued    
State and Local Jurisdiction [Member]        
Note 11 - Income Taxes (Details) [Line Items]        
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount (974,000)us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember		      
Deferred Tax Assets, Valuation Allowance   1,044,000us-gaap_DeferredTaxAssetsValuationAllowance
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember		    
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration 22,439,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember		      
Other Current Liabilities [Member]        
Note 11 - Income Taxes (Details) [Line Items]        
Liability for Uncertain Tax Positions, Current 1,370,000us-gaap_LiabilityForUncertainTaxPositionsCurrent
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentLiabilitiesMember		      
Other Noncurrent Liabilities [Member]        
Note 11 - Income Taxes (Details) [Line Items]        
Liability for Uncertain Tax Positions, Noncurrent   $ 1,647,000us-gaap_LiabilityForUncertainTaxPositionsNoncurrent
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherNoncurrentLiabilitiesMember