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Leases - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2014 | Dec. 31, 2014 | Dec. 31, 2013 sqft
Leases [Abstract] |  |  |
Lease covered area |  |  | 13,000 aeti_AreaOfLeasedOfficeSpace
Term of lease | 64 months |  |
Lease expiration year |  | 2016 |
Rental expense |  | $ 0.4 us-gaap_LeaseAndRentalExpense | $ 0.3 us-gaap_LeaseAndRentalExpense

X
- Definition Area of leased office space. + References No definition available. + Details
Name: | aeti_AreaOfLeasedOfficeSpace
Namespace Prefix: | aeti_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Lease expiration year. + References No definition available. + Details
Name: | aeti_LeaseExpirationYear
Namespace Prefix: | aeti_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Term of the lessee's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_LesseeLeasingArrangementsOperatingLeasesTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration