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Leases - Additional Information (Detail) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2014 | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2013 ft²
Leases [Abstract] |  |  |  |
Lease covered area | ft² |  |  |  | 13,000
Term of lease | 64 months |  |  |
Lease expiration year |  | 2021 |  |
Rental expense | $ |  | $ 820 | $ 700 |

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
- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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Namespace Prefix: | us-gaap_
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