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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Statement of Financial Position [Abstract]    
Allowance for doubtful accounts $ 800us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 400us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Common stock, par value (in dollars per share) $ 0.001us-gaap_CommonStockParOrStatedValuePerShare $ 0.001us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized 250,000,000us-gaap_CommonStockSharesAuthorized 250,000,000us-gaap_CommonStockSharesAuthorized
Common Stock, Shares, Issued 85,110,000us-gaap_CommonStockSharesIssued 80,691,000us-gaap_CommonStockSharesIssued
Common stock, shares outstanding 85,110,000us-gaap_CommonStockSharesOutstanding 80,691,000us-gaap_CommonStockSharesOutstanding