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Related Party Transaction - Additional Information (Detail) - USD ($)		12 Months Ended
	Dec. 01, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Aug. 16, 2019	Jul. 26, 2019	Sep. 30, 2014	Sep. 30, 2013
Schedule of Other Related Party Transactions [Line Items]
Finance lease obligation		$ 648,000
Total long term finance lease obligations to related parties		0	$ 648,000
Remaining outstanding lease obligation				$ 413,000
Secured term note payable - related party		1,077,000	2,077,000
Due from related parties		42,000	0
Real property and buildings
Schedule of Other Related Party Transactions [Line Items]
Sublease income		8,000	24,000
Affiliated Entity
Schedule of Other Related Party Transactions [Line Items]
Purchases from related parties		23,000	80,000
Due to related parties		14,000	8,000
Affiliated Entity | TMG
Schedule of Other Related Party Transactions [Line Items]
Finance lease obligation	$ 648,000
Principal and interest payments	$ 232,000
Lease term	12 months
Annual rate	8.90%
Upfront fee payment	$ 131,000
Related party sales		0	52,000
Due from related parties		0	0
Due to related parties		582,000	22,000
Purchase of supplies and services		$ 650,000	175,000
Affiliated Entity | TMG | Equipment
Schedule of Other Related Party Transactions [Line Items]
Finance lease obligation	$ 3,200,000
Affiliated Entity | Applied Cryo Technologies
Schedule of Other Related Party Transactions [Line Items]
Ownership percentage		51.00%
Payment for equipment repairs and services		$ 516,000	447,000
Related party sales		2,000	4,000
Due from related parties		2,000	4,000
Due to related parties		121,000	24,000
TMG
Schedule of Other Related Party Transactions [Line Items]
Payroll related expenses		0	4,000
TMG | Operating Leases Related Party | Land
Schedule of Other Related Party Transactions [Line Items]
Sublease income			10,000
Secured term note payable - related party
Schedule of Other Related Party Transactions [Line Items]
Debt instrument, face amount								$ 20,500,000
Secured term note payable - related party | London Interbank Offered Rate (LIBOR)
Schedule of Other Related Party Transactions [Line Items]
Secured term note payable - related party		$ 1,100,000
Debt instrument, interest rate basis (as a percent)		3.15%					3.00%
Secured promissory note - related party | M/G Finance Co., Ltd.
Schedule of Other Related Party Transactions [Line Items]
Debt instrument, face amount					$ 5,000,000.0
Secured promissory note - related party | M/G Finance Co., Ltd. | Secured Debt
Schedule of Other Related Party Transactions [Line Items]
Debt instrument, face amount					$ 5,000,000
Secured promissory note - related party | M/G Finance Co., Ltd. | Secured Debt | To December 10, 2020
Schedule of Other Related Party Transactions [Line Items]
Interest rate (as a percent)					6.00%
Secured promissory note - related party | M/G Finance Co., Ltd. | Secured Debt | December 11, 2020 and Thereafter
Schedule of Other Related Party Transactions [Line Items]
Interest rate (as a percent)					12.00%
Chart Energy & Chemicals, Inc. [Member] | Affiliated Entity
Schedule of Other Related Party Transactions [Line Items]
Common stock, ownership percentage		8.70%
Former Executive Chairman of Board of Directors of American Electric Technologies Inc | Loan Agreement | M&I Brazil | Secured term note payable - related party
Schedule of Other Related Party Transactions [Line Items]
Interest rate (as a percent)						10.00%
Line of credit facility, maximum borrowing capacity						$ 300,000
Loan facility drawn and outstanding			$ 200,000
TMG | Executive Chairman and Chairman of our Board | Affiliated Entity
Schedule of Other Related Party Transactions [Line Items]
Beneficial ownership percentage	25.00%
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%

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