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Related Party Transactions - Additional Information (Detail) - USD ($) |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 06, 2017 | Aug. 31, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Mar. 23, 2017
Director |  |  |  |  |
Related Party Transactions (Textual) [Abstract] |  |  |  |  |
Outstanding payable balance for services rendered by law firm |  |  | $ 50,000 | $ 40,000 |
Issuance of shares as compensation |  | 150,000 |  |  |
Stock compensation expense |  |  | 70,000 |  |
Former Executive Chairman of Board of Directors | Labor And Related Compensation |  |  |  |  |
Related Party Transactions (Textual) [Abstract] |  |  |  |  |
Compensation amount |  |  | 150,000 | 90,000 |
HD Special-Situations III, L.P. | Senior Secured Term Note |  |  |  |  |
Related Party Transactions (Textual) [Abstract] |  |  |  |  |
Interest rate |  |  |  |  | 11.50%
HD Special-Situations III, L.P. | Senior Secured Term Note | Loan Agreement | M&I Brazil | Former Chairman of AETI |  |  |  |  |
Related Party Transactions (Textual) [Abstract] |  |  |  |  |
Line of credit facility, agreement date | Jun. 06, 2017 |  |  |  |
Line of credit facility, maximum borrowing capacity | $ 300,000 |  |  |  |
Loan facility drawn and outstanding |  |  | $ 200,000 |  |
Debt instrument, maturity year and month | 2019-06 |  |  |  |
Interest rate | 10.00% |  |  |  |
Debt instrument, interest rate terms |  |  | the interest rate on the loan facility is 10.0%, per annum, payable each quarter. |  |
General and Administrative Expense | Director |  |  |  |  |
Related Party Transactions (Textual) [Abstract] |  |  |  |  |
Expenses related to legal advice |  |  | $ 20,000 | $ 40,000 |

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