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Loans Payable - Schedule of Allocation of Cash Proceeds to Derivative Components at their Fair Values - Promissory Note (Detail) - Promissory Note [Member] - Oceanica Resources S. de. R.L [Member] | Sep. 30, 2018 USD ($)
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Debt Instrument [Line Items] |
Cash proceeds | $ 14,750,001
Deferred Income Call Option [Member] |
Debt Instrument [Line Items] |
Cash proceeds | 383,148
2014 Convertible Promissory Notes [Member] |
Debt Instrument [Line Items] |
Cash proceeds | 14,366,853
First Tranche [Member] |
Debt Instrument [Line Items] |
Cash proceeds | 2,000,000
First Tranche [Member] | Deferred Income Call Option [Member] |
Debt Instrument [Line Items] |
Cash proceeds | 67,241
First Tranche [Member] | 2014 Convertible Promissory Notes [Member] |
Debt Instrument [Line Items] |
Cash proceeds | 1,932,759
Second Tranche [Member] |
Debt Instrument [Line Items] |
Cash proceeds | 6,000,000
Second Tranche [Member] | Deferred Income Call Option [Member] |
Debt Instrument [Line Items] |
Cash proceeds | 173,659
Second Tranche [Member] | 2014 Convertible Promissory Notes [Member] |
Debt Instrument [Line Items] |
Cash proceeds | 5,826,341
Third Tranche [Member] |
Debt Instrument [Line Items] |
Cash proceeds | 3,000,000
Third Tranche [Member] | Deferred Income Call Option [Member] |
Debt Instrument [Line Items] |
Cash proceeds | 75,828
Third Tranche [Member] | 2014 Convertible Promissory Notes [Member] |
Debt Instrument [Line Items] |
Cash proceeds | 2,924,172
Fourth Tranche [Member] |
Debt Instrument [Line Items] |
Cash proceeds | 2,000,000
Fourth Tranche [Member] | Deferred Income Call Option [Member] |
Debt Instrument [Line Items] |
Cash proceeds | 39,911
Fourth Tranche [Member] | 2014 Convertible Promissory Notes [Member] |
Debt Instrument [Line Items] |
Cash proceeds | 1,960,089
Fifth Tranche [Member] |
Debt Instrument [Line Items] |
Cash proceeds | 17,500,001
Fifth Tranche [Member] | Deferred Income Call Option [Member] |
Debt Instrument [Line Items] |
Cash proceeds | 26,509
Fifth Tranche [Member] | 2014 Convertible Promissory Notes [Member] |
Debt Instrument [Line Items] |
Cash proceeds | $ 1,723,492

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