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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Accounts receivable-trade, allowance $ 315us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 327us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Inventories, allowance 73us-gaap_InventoryAdjustments 40us-gaap_InventoryAdjustments
Redeemable convertible preferred stock, Series A, discount 729aeti_TemporaryEquityDiscountOnShares 764aeti_TemporaryEquityDiscountOnShares
Redeemable convertible preferred stock, par value $ 0.001us-gaap_TemporaryEquityParOrStatedValuePerShare $ 0.001us-gaap_TemporaryEquityParOrStatedValuePerShare
Redeemable convertible preferred stock, shares authorized 1,000,000us-gaap_TemporaryEquitySharesAuthorized 1,000,000us-gaap_TemporaryEquitySharesAuthorized
Redeemable convertible preferred stock, shares issued 1,000,000us-gaap_TemporaryEquitySharesIssued 1,000,000us-gaap_TemporaryEquitySharesIssued
Redeemable convertible preferred stock, shares outstanding 1,000,000us-gaap_TemporaryEquitySharesOutstanding 1,000,000us-gaap_TemporaryEquitySharesOutstanding
Common stock, par value $ 0.001us-gaap_CommonStockParOrStatedValuePerShare $ 0.001us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized 50,000,000us-gaap_CommonStockSharesAuthorized 50,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued 8,185,323us-gaap_CommonStockSharesIssued 8,185,323us-gaap_CommonStockSharesIssued
Common stock, shares outstanding 8,008,759us-gaap_CommonStockSharesOutstanding 8,008,759us-gaap_CommonStockSharesOutstanding
Treasury stock, shares 111,640us-gaap_TreasuryStockShares 49,863us-gaap_TreasuryStockShares
Equity Method Investments    
Retained earnings; accumulated statutory reserves in equity method investments $ 2,100us-gaap_RetainedEarningsAppropriated
/ us-gaap_InformationByFinancialStatementLineItemAxis
= us-gaap_EquityMethodInvestmentsMember		 $ 1,857us-gaap_RetainedEarningsAppropriated
/ us-gaap_InformationByFinancialStatementLineItemAxis
= us-gaap_EquityMethodInvestmentsMember