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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 28, 2014
Dec. 29, 2013
Statement of Financial Position [Abstract]    
Allowance for doubtful accounts receivable, current $ 110us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 105us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Accumulated amortization on other assets $ 1,067us-gaap_AccumulatedAmortizationDeferredFinanceCosts $ 891us-gaap_AccumulatedAmortizationDeferredFinanceCosts
Common stock, par value $ 0.01us-gaap_CommonStockParOrStatedValuePerShare $ 0.01us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized 50,000,000us-gaap_CommonStockSharesAuthorized 50,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued 24,445,345us-gaap_CommonStockSharesIssued 24,339,537us-gaap_CommonStockSharesIssued
Common stock, shares outstanding 22,180,458us-gaap_CommonStockSharesOutstanding 22,297,701us-gaap_CommonStockSharesOutstanding
Treasury stock, shares 2,264,887us-gaap_TreasuryStockShares 2,041,836us-gaap_TreasuryStockShares