Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 28, 2015	Dec. 27, 2014
Trade receivables, allowances (in Dollars)	$ 1,166	$ 1,184
Common stock, par value (in Dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	75,000,000us-gaap_CommonStockSharesAuthorized	75,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares outstanding	28,021,130us-gaap_CommonStockSharesOutstanding	27,732,030us-gaap_CommonStockSharesOutstanding
Common stock, shares issued	29,002,229us-gaap_CommonStockSharesIssued	28,713,129us-gaap_CommonStockSharesIssued
Treasury stock, shares	981,099us-gaap_TreasuryStockShares	981,099us-gaap_TreasuryStockShares

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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