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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]    
Allowances for doubtful accounts receivable, current $ 1,300us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 2,221us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Deferred tax assets valuation allowance, current 11,172us-gaap_DeferredTaxAssetsValuationAllowanceCurrent 15,176us-gaap_DeferredTaxAssetsValuationAllowanceCurrent
Deferred tax assets valuation allowance, non current $ 103,018us-gaap_DeferredTaxAssetsValuationAllowanceNoncurrent $ 104,101us-gaap_DeferredTaxAssetsValuationAllowanceNoncurrent
Preferred stock, par value $ 0.0001us-gaap_PreferredStockParOrStatedValuePerShare $ 0.0001us-gaap_PreferredStockParOrStatedValuePerShare
Preferred stock, shares authorized 25,000,000us-gaap_PreferredStockSharesAuthorized 25,000,000us-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 $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized 75,000,000us-gaap_CommonStockSharesAuthorized 75,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued 21,419,073us-gaap_CommonStockSharesIssued 21,652,341us-gaap_CommonStockSharesIssued
Common stock, shares outstanding 21,978,762us-gaap_CommonStockSharesOutstanding 21,652,341us-gaap_CommonStockSharesOutstanding