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Consolidated Balance Sheets (Parentheticals) (USD $)
In Thousands, except Per Share data, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Accounts receivable, allowance (in Dollars) $ 381us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 354us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Preferred stock, par value (in Dollars per share) $ 0.00015us-gaap_PreferredStockParOrStatedValuePerShare $ 0.00015us-gaap_PreferredStockParOrStatedValuePerShare
Preferred stock, shares authorized 5,000us-gaap_PreferredStockSharesAuthorized 5,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued
Preferred stock, shares outstanding 0us-gaap_PreferredStockSharesOutstanding 0us-gaap_PreferredStockSharesOutstanding
Common stock, par value (in Dollars per share) $ 0.00015us-gaap_CommonStockParOrStatedValuePerShare $ 0.00015us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized 70,000us-gaap_CommonStockSharesAuthorized 70,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued 36,258us-gaap_CommonStockSharesIssued 35,285us-gaap_CommonStockSharesIssued
Common stock, shares outstanding 31,116us-gaap_CommonStockSharesOutstanding 30,437us-gaap_CommonStockSharesOutstanding
Treasury stock shares 5,142us-gaap_TreasuryStockShares 4,848us-gaap_TreasuryStockShares