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Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013
Condensed Consolidated Balance Sheet [Abstract]
Allowances on accounts receivable	$ 19us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent	$ 6us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Common stock, par value	$ 0.01us-gaap_CommonStockParOrStatedValuePerShare	$ 0.01us-gaap_CommonStockParOrStatedValuePerShare
Common stock, authorized	200,000,000us-gaap_CommonStockSharesAuthorized	200,000,000us-gaap_CommonStockSharesAuthorized
Common stock, outstanding	28,934,700us-gaap_CommonStockSharesOutstanding	29,148,029us-gaap_CommonStockSharesOutstanding
Treasury stock, shares	827,090us-gaap_TreasuryStockShares	0us-gaap_TreasuryStockShares

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A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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