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Related Party Transaction - Additional Information (Detail) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Aug. 16, 2019 | Jul. 26, 2019 | Sep. 30, 2013
Schedule of Other Related Party Transactions [Line Items] |  |  |  |  |  |  |  |  |
Total Long Term Finance Lease Obligations to Related Parties |  |  |  |  | $ 3,367,000 |  |  |  |
Real property and buildings |  |  |  |  |  |  |  |  |
Schedule of Other Related Party Transactions [Line Items] |  |  |  |  |  |  |  |  |
Sublease income | $ 6,000 | $ 15,000 | $ 18,000 | $ 40,000 |  |  |  |  |
TMG |  |  |  |  |  |  |  |  |
Schedule of Other Related Party Transactions [Line Items] |  |  |  |  |  |  |  |  |
Payroll related expenses | 0 | 3,000 | 4,000 | 10,000 |  |  |  |  |
Purchase of supplies and services | $ 0 | 53,000 | 44,000 | 88,000 |  |  |  |  |
TMG | Operating Leases Related Party | Land |  |  |  |  |  |  |  |  |
Schedule of Other Related Party Transactions [Line Items] |  |  |  |  |  |  |  |  |
Sublease income |  |  | $ 9,000 | $ 9,000 |  |  |  |  |
Applied Cryo Technologies |  |  |  |  |  |  |  |  |
Schedule of Other Related Party Transactions [Line Items] |  |  |  |  |  |  |  |  |
Ownership percentage | 51.00% |  | 51.00% |  |  |  |  |  |
Purchase of equipment and services |  |  | $ 302,000 |  |  |  |  |  |
Payment for equipment repairs and services |  |  | 110,000 |  |  |  |  |  |
Secured Promissory Note | M/G Finance Co., Ltd. |  |  |  |  |  |  |  |  |
Schedule of Other Related Party Transactions [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  | $ 5,000,000 |  |
Senior Secured Term Note |  |  |  |  |  |  |  |  |
Schedule of Other Related Party Transactions [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  | $ 20,500,000
Former Executive Chairman of Board of Directors of American Electric Technologies Inc | Loan Agreement | M&I Brazil | Senior Secured Term Note |  |  |  |  |  |  |  |  |
Schedule of Other Related Party Transactions [Line Items] |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  |  | $ 300,000 |
Loan facility drawn and outstanding | $ 200,000 |  | $ 200,000 |  |  |  |  |  |
Interest rate |  |  |  |  |  |  |  | 10.00% |
TMG | Operating Leases Related Party | Land |  |  |  |  |  |  |  |  |
Schedule of Other Related Party Transactions [Line Items] |  |  |  |  |  |  |  |  |
Sublease income | $ 3,000 | $ 3,000 |  |  |  |  |  |  |
Subsidiaries | Stabilis LLC |  |  |  |  |  |  |  |  |
Schedule of Other Related Party Transactions [Line Items] |  |  |  |  |  |  |  |  |
Total Long Term Finance Lease Obligations to Related Parties |  |  |  |  | $ 1,500,000 |  |  |  |
Capital lease obligation, lease term |  |  |  |  | 24 months |  |  |  |
Capital lease obligation, interest rate |  |  |  |  | 10.00% |  |  |  |
Subsidiaries | TMG |  |  |  |  |  |  |  |  |
Schedule of Other Related Party Transactions [Line Items] |  |  |  |  |  |  |  |  |
Total Long Term Finance Lease Obligations to Related Parties |  |  |  |  |  | $ 10,100,000 |  |  |
Percentage of beneficial ownership |  |  |  |  |  | 25.00% |  |  |
Annual interest rate on lease agreement |  |  |  |  |  | 6.00% |  |  |
Percentage of outstanding lease obligations repaid |  |  |  |  |  | 80.00% |  |  |
Capital lease obligation, lease term |  |  |  |  |  | 36 months |  |  |
Capital lease obligation, interest rate |  |  |  |  |  | 10.00% |  |  |

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