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CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (Unaudited) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Income Statement [Abstract]    
Revenues $ 34,726us-gaap_SalesRevenueNet $ 60,665us-gaap_SalesRevenueNet
Cost of goods sold 34,954us-gaap_CostOfGoodsAndServicesSold 45,041us-gaap_CostOfGoodsAndServicesSold
Gross profit (loss) (228)us-gaap_GrossProfit 15,624us-gaap_GrossProfit
Research and development expenses 109us-gaap_ResearchAndDevelopmentExpense 100us-gaap_ResearchAndDevelopmentExpense
Selling, general and administrative expenses 3,634us-gaap_SellingGeneralAndAdministrativeExpense 2,842us-gaap_SellingGeneralAndAdministrativeExpense
Operating income (loss) (3,971)us-gaap_OperatingIncomeLoss 12,682us-gaap_OperatingIncomeLoss
Interest expense    
Interest rate expense (2,546)us-gaap_InterestExpense (2,920)us-gaap_InterestExpense
Amortization expense (1,723)us-gaap_AdjustmentForAmortization (2,118)us-gaap_AdjustmentForAmortization
Loss on debt extinguishment (330)us-gaap_ExtinguishmentOfDebtGainLossNetOfTax (115)us-gaap_ExtinguishmentOfDebtGainLossNetOfTax
Other income (expense) (67)us-gaap_OtherNonoperatingIncomeExpense 164us-gaap_OtherNonoperatingIncomeExpense
Income (loss) before income taxes (8,637)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 7,693us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Income tax expense (6)us-gaap_IncomeTaxExpenseBenefit (6)us-gaap_IncomeTaxExpenseBenefit
Net income (loss) (8,643)us-gaap_NetIncomeLoss 7,687us-gaap_NetIncomeLoss
Other comprehensive income    
Foreign currency translation adjustment 38us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax 108us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax
Comprehensive income (loss) $ (8,605)us-gaap_ComprehensiveIncomeNetOfTax $ 7,795us-gaap_ComprehensiveIncomeNetOfTax
Net income(loss) per common share    
Basic $ (0.42)us-gaap_EarningsPerShareBasic $ 0.38us-gaap_EarningsPerShareBasic
Diluted $ (0.42)us-gaap_EarningsPerShareDiluted $ 0.34us-gaap_EarningsPerShareDiluted
Weighted average shares outstanding    
Basic 20,595us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 20,007us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Diluted 20,595us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 22,657us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding