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Segment Reporting - Selected Financial Details Regarding the Company's Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified | 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
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Net sales | $ 13,693 us-gaap_SalesRevenueNet | $ 14,283 us-gaap_SalesRevenueNet | $ 13,430 us-gaap_SalesRevenueNet | $ 15,848 us-gaap_SalesRevenueNet | $ 16,496 us-gaap_SalesRevenueNet | $ 16,236 us-gaap_SalesRevenueNet | $ 13,499 us-gaap_SalesRevenueNet | $ 13,008 us-gaap_SalesRevenueNet | $ 57,254 us-gaap_SalesRevenueNet | $ 59,239 us-gaap_SalesRevenueNet
Gross profit (loss) | 37 us-gaap_GrossProfit | 495 us-gaap_GrossProfit | 2,028 us-gaap_GrossProfit | 2,435 us-gaap_GrossProfit | 3,554 us-gaap_GrossProfit | 2,759 us-gaap_GrossProfit | 2,089 us-gaap_GrossProfit | 2,765 us-gaap_GrossProfit | 4,995 us-gaap_GrossProfit | 11,167 us-gaap_GrossProfit
Income (loss) from continuing operations |  |  |  |  |  |  |  |  | (3,895)us-gaap_OperatingIncomeLoss | 3,162 us-gaap_OperatingIncomeLoss
Corporate and other unallocated expenses |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations |  |  |  |  |  |  |  |  | (7,597)us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = aeti_CorporateNonSegmentAndOtherUnallocatedExpensesMember | (6,995)us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = aeti_CorporateNonSegmentAndOtherUnallocatedExpensesMember
Technical Products and Services |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 49,967 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = aeti_TechnicalProductsAndServicesMember | 49,150 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = aeti_TechnicalProductsAndServicesMember
Gross profit (loss) |  |  |  |  |  |  |  |  | 4,132 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = aeti_TechnicalProductsAndServicesMember | 9,072 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = aeti_TechnicalProductsAndServicesMember
Technical Products and Services | Operating Segments |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations |  |  |  |  |  |  |  |  | 3,177 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = aeti_TechnicalProductsAndServicesMember | 8,061 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = aeti_TechnicalProductsAndServicesMember
Electrical and Instrumentation Construction |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 7,287 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = aeti_ElectricalAndInstrumentationConstructionMember | 10,089 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = aeti_ElectricalAndInstrumentationConstructionMember
Gross profit (loss) |  |  |  |  |  |  |  |  | 863 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = aeti_ElectricalAndInstrumentationConstructionMember | 2,095 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = aeti_ElectricalAndInstrumentationConstructionMember
Electrical and Instrumentation Construction | Operating Segments |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations |  |  |  |  |  |  |  |  | $ 525 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = aeti_ElectricalAndInstrumentationConstructionMember | $ 2,096 us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = aeti_ElectricalAndInstrumentationConstructionMember

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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1,2) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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