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Condensed Consolidated Statements of Operations and Comprehensive Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Operating revenues	$ 51,936us-gaap_Revenues	$ 44,330us-gaap_Revenues	$ 99,777us-gaap_Revenues	$ 83,961us-gaap_Revenues
Cost of sales	35,287us-gaap_CostOfGoodsSold	30,971us-gaap_CostOfGoodsSold	68,532us-gaap_CostOfGoodsSold	58,689us-gaap_CostOfGoodsSold
Gross Profit	16,649us-gaap_GrossProfit	13,359us-gaap_GrossProfit	31,245us-gaap_GrossProfit	25,272us-gaap_GrossProfit
Operating expenses, net	8,230us-gaap_OperatingExpenses	7,480us-gaap_OperatingExpenses	14,969us-gaap_OperatingExpenses	14,471us-gaap_OperatingExpenses
Operating income	8,419us-gaap_OperatingIncomeLoss	5,879us-gaap_OperatingIncomeLoss	16,276us-gaap_OperatingIncomeLoss	10,801us-gaap_OperatingIncomeLoss
Loss on change in fair value of warrant liability	(4,645)us-gaap_UnrealizedGainLossOnDerivatives	0us-gaap_UnrealizedGainLossOnDerivatives	(13,525)us-gaap_UnrealizedGainLossOnDerivatives	0us-gaap_UnrealizedGainLossOnDerivatives
Non-operating revenues	1,191us-gaap_OtherNonoperatingIncome	862us-gaap_OtherNonoperatingIncome	2,477us-gaap_OtherNonoperatingIncome	1,741us-gaap_OtherNonoperatingIncome
Interest expense	2,294us-gaap_InterestExpenseDebt	1,818us-gaap_InterestExpenseDebt	4,267us-gaap_InterestExpenseDebt	3,487us-gaap_InterestExpenseDebt
Income before taxes	2,671us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	4,923us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	961us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	9,055us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Income tax provision	2,263us-gaap_IncomeTaxExpenseBenefit	1,719us-gaap_IncomeTaxExpenseBenefit	5,234us-gaap_IncomeTaxExpenseBenefit	3,350us-gaap_IncomeTaxExpenseBenefit
Net (loss) income	408us-gaap_NetIncomeLoss	3,204us-gaap_NetIncomeLoss	(4,273)us-gaap_NetIncomeLoss	5,705us-gaap_NetIncomeLoss
Comprehensive income:
Net (loss) income	408us-gaap_NetIncomeLoss	3,204us-gaap_NetIncomeLoss	(4,273)us-gaap_NetIncomeLoss	5,705us-gaap_NetIncomeLoss
Foreign currency translation adjustments	2,885us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	(342)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	2,709us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	1,636us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Total comprehensive (loss) income	$ 3,293us-gaap_ComprehensiveIncomeNetOfTax	$ 2,862us-gaap_ComprehensiveIncomeNetOfTax	$ (1,564)us-gaap_ComprehensiveIncomeNetOfTax	$ 7,341us-gaap_ComprehensiveIncomeNetOfTax
Basic (loss) income per share	$ 0.02us-gaap_EarningsPerShareBasic	$ 0.16us-gaap_EarningsPerShareBasic	$ (0.18)us-gaap_EarningsPerShareBasic	$ 0.28us-gaap_EarningsPerShareBasic
Diluted (loss) income per share	$ 0.02us-gaap_EarningsPerShareDiluted	$ 0.16us-gaap_EarningsPerShareDiluted	$ (0.18)us-gaap_EarningsPerShareDiluted	$ 0.28us-gaap_EarningsPerShareDiluted
Basic weighted average common shares outstanding	24,311,199us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	20,567,141us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	24,276,947us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	20,567,141us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Diluted weighted average common shares outstanding	27,986,839us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	20,567,141us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	24,276,947us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	20,567,141us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding

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