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Note 13 - Stockholders' Equity (Details) - Summary Changes in Outstanding Shares of Common Stock
12 Months Ended
Jan. 03, 2015
Dec. 28, 2013
Dec. 29, 2012
Stock      
Shares as of 17,386,920us-gaap_CommonStockSharesOutstanding 17,068,182us-gaap_CommonStockSharesOutstanding 17,405,270us-gaap_CommonStockSharesOutstanding
Shares issued under employee stock plans, net of shares withheld in lieu of tax withholding 300,705us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation 346,271us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation 29,612us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation
Repurchase of shares (326,990)us-gaap_StockRepurchasedAndRetiredDuringPeriodShares (27,533)us-gaap_StockRepurchasedAndRetiredDuringPeriodShares (366,700)us-gaap_StockRepurchasedAndRetiredDuringPeriodShares
Shares as of 17,360,635us-gaap_CommonStockSharesOutstanding 17,386,920us-gaap_CommonStockSharesOutstanding 17,068,182us-gaap_CommonStockSharesOutstanding