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Amount of the total principal payments made during the annual reporting period.

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Amount of assets pledged to secure a debt instrument.

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Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature.

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Face (par) amount of debt instrument at time of issuance.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Debt - Additional Information (Detail)			12 Months Ended
Debt - Additional Information (Detail)	Aug. 30, 2019 USD ($) day shares	Aug. 21, 2017 USD ($) Installment	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	May 08, 2020 USD ($)	Apr. 07, 2020	Aug. 16, 2019 USD ($)	Jul. 26, 2019 USD ($)	Sep. 30, 2014	Sep. 30, 2013 USD ($)
Debt Instrument [Line Items]
Convertible debt, exchanged	$ 7,000,000		$ 0	$ 6,889,000
Issuance of common stock in satisfaction of indebtedness (in shares) \| shares	1,470,807
Percent of volume-weighted average prices per share	90.00%
Consecutive trading days \| day	5
Gain on extinguishment of debt	$ 100,000		0	111,000
Annual commercial insurance premiums			800,000
Outstanding principal amount of premium financed			$ 400,000	300,000
Insurance terms			10 months
Short-term financing			$ 432,000	558,000
Related party debt			$ 5,000,000	5,000,000
Plus accrued interest due on August, 24, 2017
Debt Instrument [Line Items]
Payment terms of principal and interest		$ 2,500,000
Plus accrued interest due on August 24, 2018
Debt Instrument [Line Items]
Payment terms of principal and interest		2,500,000
Plus accrued interest due on August 24, 2019
Debt Instrument [Line Items]
Payment terms of principal and interest		2,500,000
Plus accrued interest on each anniversary date of August 24, 2019 thereafter
Debt Instrument [Line Items]
Payment terms of principal and interest		$ 1,500,000
Debt instrument number of installment \| Installment		4
Plus accrued interest on the remaining unpaid balance of the Amended Secured Term Note Payable on August 24, 2024
Debt Instrument [Line Items]
Payment terms of principal and interest		$ 600,000
Event all principal and interest is paid in full by August 24, 2023 to be forgiven
Debt Instrument [Line Items]
Payment terms of principal and interest		$ 2,200,000
Santander Bank
Debt Instrument [Line Items]
Interest rate (as a percent)			11.88%			12.68%
Short-term financing				41,000
Brazilian Interbank
Debt Instrument [Line Items]
Interest rate (as a percent)			7.60%
Debt instrument, interest rate basis (as a percent)			1.90%
Outstanding principal amount of premium financed			$ 231,000
Loan Pursuant to CARES Act \| Cadence Bank, N.A. \| Notes Payable to Banks
Debt Instrument [Line Items]
Debt instrument, face amount					$ 1,100,000
Interest rate (as a percent)					1.00%
Secured term note payable - related party
Debt Instrument [Line Items]
Debt instrument, face amount										$ 20,500,000
Debt instrument, collateral amount										$ 20,000,000.0
Number of installments \| Installment		8
Secured term note payable - related party \| Former Executive Chairman of Board of Directors of American Electric Technologies Inc \| M&I Brazil \| Loan Agreement
Debt Instrument [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
Secured term note payable - related party \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, interest rate basis (as a percent)			3.15%						3.00%
Secured promissory note - related party \| M/G Finance Co., Ltd.
Debt Instrument [Line Items]
Debt instrument, face amount							$ 5,000,000.0
Secured promissory note - related party \| Secured Debt \| M/G Finance Co., Ltd.
Debt Instrument [Line Items]
Debt instrument, face amount							5,000,000
Certain pieces of equipment for secured debt							$ 5,000,000
Secured promissory note - related party \| Secured Debt \| M/G Finance Co., Ltd. \| To December 10, 2020
Debt Instrument [Line Items]
Interest rate (as a percent)							6.00%
Secured promissory note - related party \| Secured Debt \| M/G Finance Co., Ltd. \| December 11, 2020 and Thereafter
Debt Instrument [Line Items]
Interest rate (as a percent)							12.00%
2019 to 2020
Debt Instrument [Line Items]
Insurance notes interest rate (as a percent)			6.20%
2020 to 2021
Debt Instrument [Line Items]
Insurance notes interest rate (as a percent)			5.45%