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General and Basis of Presentation - Additional Information (Detail) - USD ($) | Jul. 26, 2019 | Nov. 30, 2018 | Dec. 17, 2018 | Feb. 28, 2017
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Organization And Basis Of Presentation [Line Items] |  |  |  |
Members contribution |  | 1,000 |  |
Convertible debt |  | $ 48,700,000 |  |
Share Exchange Agreement [Member] | Subsequent Event [Member] |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |
Business combination share exchange resultant description | $ 0 |  |  |
American Electric Technologies Inc [Member] | Share Exchange Agreement [Member] | Subsequent Event [Member] |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |
Percentage of outstanding limited liability interest acquired | 100.00% |  |  |
Number of common stock issued under share exchange agreement | $ 105,558,606 |  |  |
Percentage of number of common stock issued under share exchange agreement | 90.00% |  |  |
Percentage of beneficial ownership | 88.40% |  |  |
PEG Partners LLC [Member] |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |
Business acquisition, percentage of voting interests acquired |  |  |  | 80.00%
PEG Partners LLC [Member] | Share Exchange Agreement [Member] | Subsequent Event [Member] |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |
Percentage of outstanding limited liability interest acquired | 20.00% |  |  |
PEG Partners LLC [Member] | Parent Company [Member] | Share Exchange Agreement [Member] | Subsequent Event [Member] |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |
Percentage of outstanding limited liability interest acquired | 80.00% |  |  |
Capital Unit, Class B [Member] |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |
Exchange of units |  | 2,000 |  |
Capital Unit, Class A [Member] |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |
Exchange of units |  | 4,874.28 |  |
Prometheus Energy Group Inc. [Member] |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |
Business acquisition, percentage of voting interests acquired |  |  |  | 80.00%
American Electric Technologies Inc [Member] |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |
Percentage of outstanding units exchanged |  |  | 100.00% |

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