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Loans Payable - Note 12 - Vendor note payable - Additional Information (Detail) - USD ($) |  | 3 Months Ended
--- | --- | ---
Jun. 30, 2018 | Mar. 31, 2021 | Mar. 31, 2020
Trade payable, interest bearing interest rate |  | 12.00% |
Trade payable in accounts payable |  | $ 484,009 |
Collateral asset carrying value |  | 0 |
Interest Expense |  | 2,380,476 | $ 1,335,618
Magellan Offshore Services Ltd [Member] |  |  |
Interest Expense |  | $ 14,321 | $ 14,480
Magellan Offshore Services Ltd [Member] | Marine Equipment [Member] |  |  |
Proceeds from sale of marine equipment | $ 1,000,000 |  |
Contingent liability | $ 500,000 |  |
Collateral Agreement [Member] |  |  |
Debt instrument maturity date |  | Aug. 31, 2018 |

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