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Loans Payable - Note 12 - Vendor note payable - Additional Information (Detail) - USD ($)		3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 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		2,629,253	$ 1,561,697	5,009,729	$ 2,897,315
Accrued Interest		22,634,452		22,634,452		$ 15,800,317
Magellan Offshore Services Ltd [Member]
Trade payable in accounts payable		484,009		484,009		$ 484,009
Interest Expense		14,322	$ 14,480	28,803	$ 28,961
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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