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Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Cash flows from operating activities:    
Net income (loss) from continuing operations $ (2,054)us-gaap_IncomeLossFromContinuingOperations $ 5,260us-gaap_IncomeLossFromContinuingOperations
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Deferred income tax provision (benefit) (334)us-gaap_DeferredIncomeTaxesAndTaxCredits 593us-gaap_DeferredIncomeTaxesAndTaxCredits
Equity income from foreign joint ventures’ operations (2,194)us-gaap_IncomeLossFromEquityMethodInvestments (3,024)us-gaap_IncomeLossFromEquityMethodInvestments
Depreciation and amortization 684us-gaap_DepreciationAndAmortization 498us-gaap_DepreciationAndAmortization
Stock based compensation 793us-gaap_ShareBasedCompensation 850us-gaap_ShareBasedCompensation
Provision for bad debt (12)aeti_WriteOffsAndProvisionForDoubtfulAccounts 65aeti_WriteOffsAndProvisionForDoubtfulAccounts
(Gain)/Loss on sale of property and equipment   (143)us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Allowance for obsolete inventory 33us-gaap_InventoryWriteDown 32us-gaap_InventoryWriteDown
Deferred compensation costs 78us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense 90us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense
Change in operating assets and liabilities:    
Accounts receivable (1,645)us-gaap_IncreaseDecreaseInAccountsReceivable (1,438)us-gaap_IncreaseDecreaseInAccountsReceivable
Income taxes payable 30us-gaap_IncreaseDecreaseInAccruedTaxesPayable 111us-gaap_IncreaseDecreaseInAccruedTaxesPayable
Inventories 383us-gaap_IncreaseDecreaseInInventories 352us-gaap_IncreaseDecreaseInInventories
Costs and estimated earnings in excess of billings on uncompleted contracts 2,324us-gaap_IncreaseDecreaseInCostInExcessOfBillingOnUncompletedContract (3,107)us-gaap_IncreaseDecreaseInCostInExcessOfBillingOnUncompletedContract
Prepaid expenses and other current assets (66)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets (215)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Accounts payable and accrued liabilities 787us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities 1,487us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
Billings in excess of costs and estimated earnings on uncompleted contracts (1,038)us-gaap_IncreaseDecreaseInBillingInExcessOfCostOfEarnings (555)us-gaap_IncreaseDecreaseInBillingInExcessOfCostOfEarnings
Other 22us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet  
Net cash provided by (used in) operating activities (2,209)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations 856us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
Cash flows from investing activities:    
Purchases of property, plant and equipment and other assets (4,878)us-gaap_PaymentsToAcquireProductiveAssets (1,805)us-gaap_PaymentsToAcquireProductiveAssets
Proceeds from disposal of property plant and equipment   575us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Proceeds from joint ventures’ operations dividends 2,522us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital 1,344us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital
Proceeds from joint ventures’ repayment of advances   180us-gaap_ProceedsFromCollectionOfAdvanceToAffiliate
Proceeds from disposal of joint venture 317us-gaap_ProceedsFromDivestitureOfInterestInJointVenture  
Net cash provided by (used in) from investing activities (2,039)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations 294us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
Cash flows from financing activities:    
Proceeds from issuance of common stock 132us-gaap_ProceedsFromIssuanceOfCommonStock 47us-gaap_ProceedsFromIssuanceOfCommonStock
Treasury stocks purchase (484)us-gaap_PaymentsForRepurchaseOfCommonStock (147)us-gaap_PaymentsForRepurchaseOfCommonStock
Preferred stock cash dividend (300)us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock (300)us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock
Advances from credit facility 3,500us-gaap_ProceedsFromLinesOfCredit  
Net cash provided by (used in) financing activities 2,848us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations (400)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Net increase (decrease) in cash and cash equivalents from continuing operations (1,400)us-gaap_NetCashProvidedByUsedInContinuingOperations 750us-gaap_NetCashProvidedByUsedInContinuingOperations
Advances from (to) discontinued operations 802us-gaap_NetCashProvidedByUsedInDiscontinuedOperations (1,079)us-gaap_NetCashProvidedByUsedInDiscontinuedOperations
Net increase (decrease) in cash and cash equivalents (598)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease (329)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents, beginning of period 4,148us-gaap_CashAndCashEquivalentsAtCarryingValue 4,477us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents, end of period 3,550us-gaap_CashAndCashEquivalentsAtCarryingValue 4,148us-gaap_CashAndCashEquivalentsAtCarryingValue
Supplemental disclosures of cash flow information:    
Interest paid 36us-gaap_InterestPaid 27us-gaap_InterestPaid
Income taxes paid $ 344us-gaap_IncomeTaxesPaid $ 179us-gaap_IncomeTaxesPaid