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Consolidated Statements of Operations (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Income Statement [Abstract]    
Net sales $ 57,254us-gaap_SalesRevenueNet $ 59,239us-gaap_SalesRevenueNet
Cost of sales 52,259us-gaap_CostOfGoodsAndServicesSold 48,072us-gaap_CostOfGoodsAndServicesSold
Gross profit 4,995us-gaap_GrossProfit 11,167us-gaap_GrossProfit
Operating expenses:    
Research and development 807us-gaap_ResearchAndDevelopmentExpense 499us-gaap_ResearchAndDevelopmentExpense
Selling and marketing 2,517us-gaap_SellingAndMarketingExpense 2,147us-gaap_SellingAndMarketingExpense
General and administrative 5,566us-gaap_GeneralAndAdministrativeExpense 5,359us-gaap_GeneralAndAdministrativeExpense
Total operating expenses 8,890us-gaap_OperatingExpenses 8,005us-gaap_OperatingExpenses
Income (loss) from consolidated continuing operations (3,895)us-gaap_OperatingIncomeLoss 3,162us-gaap_OperatingIncomeLoss
Net equity income from foreign joint ventures’ operations:    
Equity income from foreign joint ventures’ operations 2,194us-gaap_IncomeLossFromEquityMethodInvestments 3,024us-gaap_IncomeLossFromEquityMethodInvestments
Foreign joint ventures’ operations related expenses (522)aeti_JointVentureManagementRelatedExpenses (267)aeti_JointVentureManagementRelatedExpenses
Net equity income from foreign joint ventures’ operations 1,672aeti_NetEquityIncomeFromForeignJointVentures 2,757aeti_NetEquityIncomeFromForeignJointVentures
Income (loss) from consolidated continuing operations and net equity income from foreign joint ventures’ operations (2,223)us-gaap_IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet 5,919us-gaap_IncomeLossFromContinuingOperationsBeforeInterestExpenseInterestIncomeIncomeTaxesExtraordinaryItemsNoncontrollingInterestsNet
Other income (expense):    
Interest expense and other, net (165)us-gaap_NonoperatingIncomeExpense 54us-gaap_NonoperatingIncomeExpense
Continuing operations income (loss) before income taxes (2,388)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 5,973us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Provision for income taxes (benefit) on continuing operations (334)us-gaap_IncomeTaxExpenseBenefit 713us-gaap_IncomeTaxExpenseBenefit
Net income (loss) from continuing operations (2,054)us-gaap_IncomeLossFromContinuingOperations 5,260us-gaap_IncomeLossFromContinuingOperations
Discontinued operations income (loss) (2,673)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax (709)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax
Provision for income taxes on discontinued operations 0us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation 0us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation
Net income (loss) from discontinued operations (2,673)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax (709)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
Net income (loss) before dividends on redeemable convertible preferred stock (4,727)us-gaap_NetIncomeLoss 4,551us-gaap_NetIncomeLoss
Dividends on redeemable convertible preferred stock (345)us-gaap_RedeemablePreferredStockDividends (342)us-gaap_RedeemablePreferredStockDividends
Net income (loss) attributable to common stockholders $ (5,072)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic [1] $ 4,209us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic [1]
Earnings (loss) from continuing operations per common share:    
Basic $ (0.29)us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 0.62us-gaap_IncomeLossFromContinuingOperationsPerBasicShare
Diluted $ (0.29)us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 0.56us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare
Weighted - average number of continuing operations shares outstanding:    
Basic 8,182,034us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 7,990,690us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Diluted 8,182,034us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 9,472,506us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Loss per common share from discontinued operations:    
Basic and diluted $ (0.33)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare $ (0.09)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare
Total earnings (loss) per common share:    
Basic $ (0.62)us-gaap_EarningsPerShareBasic $ 0.53us-gaap_EarningsPerShareBasic
Diluted $ (0.62)us-gaap_EarningsPerShareDiluted $ 0.48us-gaap_EarningsPerShareDiluted
Weighted - average number of common shares outstanding:    
Basic 8,182,034us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 7,990,690us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Diluted 8,182,034us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 9,472,506us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
[1] Net of preferred dividends of $345 and $342 in 2014 and 2013 respectively.