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Discontinued Operations - Analysis of Supplemental Cash Flow Information of Discontinued Business (Detail) - USD ($) $ in Thousands		12 Months Ended
	Aug. 12, 2018	Dec. 31, 2018	Dec. 31, 2017
Discontinued Operations And Disposal Groups [Abstract]
Discontinued Operation, Name of Segment [Extensible List]	aeti:MAndIElectricUSOperationsMember	aeti:MAndIElectricUSOperationsMember	aeti:MAndIElectricUSOperationsMember
Depreciation		$ 238	$ 644
Capital expenditures		$ 85	$ 738

X

- Definition

Disposal group including discontinued operation capital expenditures.

+ References

No definition available.

+ Details

Name:	aeti_DisposalGroupIncludingDiscontinuedOperationCapitalExpenditures
Namespace Prefix:	aeti_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Indicates business segment that includes component or group of components disposed of or classified as held-for-sale representing strategic shift that has or will have major effect on operation and financial result.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760

+ Details

Name:	us-gaap_DiscontinuedOperationNameOfSegmentExtensibleList
Namespace Prefix:	us-gaap_
Data Type:	srt-types:extensibleListItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of depreciation and amortization expense attributable to disposal group, including, but not limited to, discontinued operation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5B
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760

+ Details

Name:	us-gaap_DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration