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Consolidated Statements of Operations (Partenthetical) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Consolidated Statements Of Operations [Abstract]      
Sales to related parties $ 1,041us-gaap_RevenueFromRelatedParties $ 851us-gaap_RevenueFromRelatedParties $ 558us-gaap_RevenueFromRelatedParties
Services from related parties $ 243us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty $ 133us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty $ 42us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty