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Other Current Liabilities - Components of Other Current Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Payables and Accruals [Abstract]    
Accrued expenses $ 2,519us-gaap_AccruedLiabilitiesCurrent $ 2,166us-gaap_AccruedLiabilitiesCurrent
Taxes 117us-gaap_TaxesPayableCurrent 504us-gaap_TaxesPayableCurrent
Warranty provision 222us-gaap_ProductWarrantyAccrualClassifiedCurrent 178us-gaap_ProductWarrantyAccrualClassifiedCurrent
Restructuring liabilities 82us-gaap_RestructuringReserveCurrent 137us-gaap_RestructuringReserveCurrent
Other 88us-gaap_OtherAccruedLiabilitiesCurrent 151us-gaap_OtherAccruedLiabilitiesCurrent
Other current liabilities $ 3,028us-gaap_OtherLiabilitiesCurrent $ 3,136us-gaap_OtherLiabilitiesCurrent