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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Statement of Financial Position [Abstract]    
Accounts receivable, allowances $ 421us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 428us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Preferred Stock, Par or Stated Value Per Share $ 0.0001us-gaap_PreferredStockParOrStatedValuePerShare $ 0.0001us-gaap_PreferredStockParOrStatedValuePerShare
Preferred Stock, Shares Authorized 5,000,000us-gaap_PreferredStockSharesAuthorized 5,000,000us-gaap_PreferredStockSharesAuthorized
Preferred Stock, Shares Issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued
Preferred Stock, Shares Outstanding 0us-gaap_PreferredStockSharesOutstanding 0us-gaap_PreferredStockSharesOutstanding
Preferred Stock, Shares Outstanding $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare
Common Stock, Shares Authorized 100,000,000us-gaap_CommonStockSharesAuthorized 100,000,000us-gaap_CommonStockSharesAuthorized
Common Stock, Shares, Issued 39,868,000us-gaap_CommonStockSharesIssued 39,563,000us-gaap_CommonStockSharesIssued
Common Stock, Shares, Outstanding 39,868,000us-gaap_CommonStockSharesOutstanding 39,563,000us-gaap_CommonStockSharesOutstanding