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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                 $ 2,194,000us-gaap_IncomeLossFromEquityMethodInvestments $ 3,024,000us-gaap_IncomeLossFromEquityMethodInvestments    
Net sales 13,693,000us-gaap_SalesRevenueNet 14,283,000us-gaap_SalesRevenueNet 13,430,000us-gaap_SalesRevenueNet 15,848,000us-gaap_SalesRevenueNet 16,496,000us-gaap_SalesRevenueNet 16,236,000us-gaap_SalesRevenueNet 13,499,000us-gaap_SalesRevenueNet 13,008,000us-gaap_SalesRevenueNet 57,254,000us-gaap_SalesRevenueNet 59,239,000us-gaap_SalesRevenueNet    
Outstanding notes 201,000us-gaap_NotesPayableRelatedPartiesClassifiedCurrent               201,000us-gaap_NotesPayableRelatedPartiesClassifiedCurrent      
Foreign joint ventures' operations related expenses                 522,000aeti_JointVentureManagementRelatedExpenses 267,000aeti_JointVentureManagementRelatedExpenses    
Equity Method Investments                        
Schedule Of Equity Method Investments [Line Items]                        
Retained earnings; accumulated statutory reserves in equity method investments 2,100,000us-gaap_RetainedEarningsAppropriated
/ us-gaap_InformationByFinancialStatementLineItemAxis
= us-gaap_EquityMethodInvestmentsMember
      1,857,000us-gaap_RetainedEarningsAppropriated
/ us-gaap_InformationByFinancialStatementLineItemAxis
= us-gaap_EquityMethodInvestmentsMember
      2,100,000us-gaap_RetainedEarningsAppropriated
/ us-gaap_InformationByFinancialStatementLineItemAxis
= us-gaap_EquityMethodInvestmentsMember
1,857,000us-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                     1,000,000us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= aeti_BomayMember
1,000,000us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= aeti_BomayMember
Equity income from foreign joint ventures’ operations                 2,054,000us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= aeti_BomayMember
2,066,000us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= aeti_BomayMember
   
BOMAY | Affiliated Entity                        
Schedule Of Equity Method Investments [Line Items]                        
Net sales                 130,000us-gaap_SalesRevenueNet
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_AffiliatedEntityMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= aeti_BomayMember
325,000us-gaap_SalesRevenueNet
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_AffiliatedEntityMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= aeti_BomayMember
   
Accounts receivable from foreign joint venture 82,000us-gaap_AccountsReceivableRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_AffiliatedEntityMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= aeti_BomayMember
      119,000us-gaap_AccountsReceivableRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_AffiliatedEntityMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= aeti_BomayMember
      82,000us-gaap_AccountsReceivableRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_AffiliatedEntityMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= aeti_BomayMember
119,000us-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                 138,000us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= aeti_MIEFEMember
115,000us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= aeti_MIEFEMember
   
MIEFE | Affiliated Entity                        
Schedule Of Equity Method Investments [Line Items]                        
Net sales                 14,000us-gaap_SalesRevenueNet
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_AffiliatedEntityMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= aeti_MIEFEMember
225,000us-gaap_SalesRevenueNet
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_AffiliatedEntityMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= aeti_MIEFEMember
   
Accounts receivable from foreign joint venture $ 2,000us-gaap_AccountsReceivableRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_AffiliatedEntityMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= aeti_MIEFEMember
      $ 0us-gaap_AccountsReceivableRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_AffiliatedEntityMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= aeti_MIEFEMember
      $ 2,000us-gaap_AccountsReceivableRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_AffiliatedEntityMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= aeti_MIEFEMember
$ 0us-gaap_AccountsReceivableRelatedParties
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_AffiliatedEntityMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= aeti_MIEFEMember