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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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CURRENT ASSETS: |  |
Trade receivables, allowances | $ 893 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent | $ 840 us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
STOCKHOLDERS’ EQUITY: |  |
Preferred stock, shares authorized | 5,000,000 us-gaap_PreferredStockSharesAuthorized | 5,000,000 us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued | 0 us-gaap_PreferredStockSharesIssued | 0 us-gaap_PreferredStockSharesIssued
Common Stock, Par or Stated Value Per Share |  |
Common stock, shares authorized | 100,000,000 us-gaap_CommonStockSharesAuthorized | 100,000,000 us-gaap_CommonStockSharesAuthorized
Common stock, shares issued | 43,614,000 us-gaap_CommonStockSharesIssued | 42,846,000 us-gaap_CommonStockSharesIssued
Other |  |
OTHER ASSETS: |  |
Intangibles, accumulated amortization | 22,480 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember | 18,870 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember
Developed technology |  |
OTHER ASSETS: |  |
Intangibles, accumulated amortization | $ 27,982 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_DevelopedTechnologyRightsMember | $ 17,602 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_DevelopedTechnologyRightsMember

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