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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Statement Of Income and Comprehensive Income [Abstract]    
Net (loss) income $ (3,126)us-gaap_NetIncomeLoss $ 975us-gaap_NetIncomeLoss
Other comprehensive income:    
Retirement benefits adjustment, net of income taxes 12us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax 59us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
Total comprehensive (loss) income $ (3,114)us-gaap_ComprehensiveIncomeNetOfTax $ 1,034us-gaap_ComprehensiveIncomeNetOfTax