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Discontinued Operations - Analysis of Results of Operations of Discontinued Business (Detail) - USD ($) $ / shares in Units, $ 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
Net sales |  | $ 17,899 | $ 41,414
Cost of sales |  | 20,358 | 40,136
Selling, general and administrative expenses |  | 1,660 | 2,255
Interest expense |  | 1,298 | 1,054
Loss from discontinued operations |  | (5,417) | (2,031)
Gain on sale of discontinued operations |  | 4,521 |
Loss from discontinued operations |  | $ (896) | $ (2,031)
Earnings (loss) per share information: |  |  |
Basic and diluted |  | $ (0.10) | $ (0.24)

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- Definition Amount after tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109222160&loc=d3e957-107759 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=109222160&loc=SL51721525-107759 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5C -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721675-107760 + Details
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