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Commitments and Contingencies - Additional Information (Detail) (Medical And Hospitalization Insurance Program, USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Loss Contingencies [Line Items]    
Minimum insurance premium $ 1,165,000aeti_LaborAndRelatedInsuranceExpense $ 879,000aeti_LaborAndRelatedInsuranceExpense
Insurance reserves 166,000aeti_InsuranceReservesIncludedInAccruedPayrollAndBenefits 254,000aeti_InsuranceReservesIncludedInAccruedPayrollAndBenefits
Maximum    
Loss Contingencies [Line Items]    
Liable for all claims per insured annual amount 70,000aeti_InsuranceClaimsPerInsuredAmount
/ us-gaap_OtherCommitmentsAxis
= aeti_MedicalAndHospitalizationInsuranceProgramMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		  
Liable for all claims per insured aggregate amount $ 1,500,000aeti_InsuranceClaimsAggregateAmount
/ us-gaap_OtherCommitmentsAxis
= aeti_MedicalAndHospitalizationInsuranceProgramMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember