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Loans Payable - Note 12 - Vendor note payable - Additional Information (Detail) - USD ($)		3 Months Ended		9 Months Ended
	Jun. 30, 2018	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Trade payable, interest bearing interest rate		12.00%		12.00%
Trade payable in accounts payable		$ 484,009		$ 484,009
Collateral asset carrying value		0		0
Interest Expense		2,866,959	$ 1,858,456	7,876,688	$ 4,755,771
Accrued Interest		25,169,541		25,169,541		$ 17,763,848
Magellan Offshore Services Ltd [Member]
Trade payable in accounts payable						$ 484,009
Interest Expense		14,640	$ 14,640	43,443	$ 43,601
Magellan Offshore Services Ltd [Member] | Minimum [Member]
Contingent liability		$ 300,000		$ 300,000
Magellan Offshore Services Ltd [Member] | Marine Equipment [Member]
Proceeds from sale of marine equipment	$ 1,000,000.0
Contingent liability	$ 500,000
Collateral Agreement [Member]
Debt instrument maturity date				Aug. 31, 2018

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