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Advances to and Investments in Foreign Joint Ventures' Operations - Additional Information (Detail) (USD $) | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Apr. 30, 2007 | Dec. 31, 2006
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Equity income from foreign joint ventures’ operations |  |  |  |  |  |  |  |  | $ 2,194,000 us-gaap_IncomeLossFromEquityMethodInvestments | $ 3,024,000 us-gaap_IncomeLossFromEquityMethodInvestments |  |
Net sales | 13,693,000 us-gaap_SalesRevenueNet | 14,283,000 us-gaap_SalesRevenueNet | 13,430,000 us-gaap_SalesRevenueNet | 15,848,000 us-gaap_SalesRevenueNet | 16,496,000 us-gaap_SalesRevenueNet | 16,236,000 us-gaap_SalesRevenueNet | 13,499,000 us-gaap_SalesRevenueNet | 13,008,000 us-gaap_SalesRevenueNet | 57,254,000 us-gaap_SalesRevenueNet | 59,239,000 us-gaap_SalesRevenueNet |  |
Outstanding notes | 201,000 us-gaap_NotesPayableRelatedPartiesClassifiedCurrent |  |  |  |  |  |  |  | 201,000 us-gaap_NotesPayableRelatedPartiesClassifiedCurrent |  |  |
Foreign joint ventures' operations related expenses |  |  |  |  |  |  |  |  | 522,000 aeti_JointVentureManagementRelatedExpenses | 267,000 aeti_JointVentureManagementRelatedExpenses |  |
Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Retained earnings; accumulated statutory reserves in equity method investments | 2,100,000 us-gaap_RetainedEarningsAppropriated / us-gaap_InformationByFinancialStatementLineItemAxis = us-gaap_EquityMethodInvestmentsMember |  |  |  | 1,857,000 us-gaap_RetainedEarningsAppropriated / us-gaap_InformationByFinancialStatementLineItemAxis = us-gaap_EquityMethodInvestmentsMember |  |  |  | 2,100,000 us-gaap_RetainedEarningsAppropriated / us-gaap_InformationByFinancialStatementLineItemAxis = us-gaap_EquityMethodInvestmentsMember | 1,857,000 us-gaap_RetainedEarningsAppropriated / us-gaap_InformationByFinancialStatementLineItemAxis = us-gaap_EquityMethodInvestmentsMember |  |
BOMAY |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest in newly formed brazil company | 40.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aeti_BomayMember |  |  |  |  |  |  |  | 40.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aeti_BomayMember |  |  |
Investment in joint ventures |  |  |  |  |  |  |  |  |  |  | 1,000,000 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aeti_BomayMember | 1,000,000 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aeti_BomayMember
Equity income from foreign joint ventures’ operations |  |  |  |  |  |  |  |  | 2,054,000 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aeti_BomayMember | 2,066,000 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aeti_BomayMember |  |
BOMAY | Affiliated Entity |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 130,000 us-gaap_SalesRevenueNet / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aeti_BomayMember | 325,000 us-gaap_SalesRevenueNet / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aeti_BomayMember |  |
Accounts receivable from foreign joint venture | 82,000 us-gaap_AccountsReceivableRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aeti_BomayMember |  |  |  | 119,000 us-gaap_AccountsReceivableRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aeti_BomayMember |  |  |  | 82,000 us-gaap_AccountsReceivableRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aeti_BomayMember | 119,000 us-gaap_AccountsReceivableRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aeti_BomayMember |  |
MIEFE |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Ownership interest in newly formed brazil company | 41.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aeti_MIEFEMember |  |  |  |  |  |  |  | 41.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aeti_MIEFEMember |  |  |
Equity income from foreign joint ventures’ operations |  |  |  |  |  |  |  |  | 138,000 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aeti_MIEFEMember | 115,000 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aeti_MIEFEMember |  |
MIEFE | Affiliated Entity |  |  |  |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 14,000 us-gaap_SalesRevenueNet / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aeti_MIEFEMember | 225,000 us-gaap_SalesRevenueNet / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aeti_MIEFEMember |  |
Accounts receivable from foreign joint venture | $ 2,000 us-gaap_AccountsReceivableRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aeti_MIEFEMember |  |  |  | $ 0 us-gaap_AccountsReceivableRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aeti_MIEFEMember |  |  |  | $ 2,000 us-gaap_AccountsReceivableRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aeti_MIEFEMember | $ 0 us-gaap_AccountsReceivableRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = aeti_MIEFEMember |  |

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