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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] - USD ($) | Jun. 30, 2016 | May 11, 2015
--- | --- | ---
Debt Instrument [Line Items] |  |
Cash proceeds |  | $ 14,750,000
Oceanica Resources S. de. R.L [Member] |  |
Debt Instrument [Line Items] |  |
Cash proceeds | $ 14,750,000 |
Oceanica Resources S. de. R.L [Member] | Deferred Income Call Option [Member] |  |
Debt Instrument [Line Items] |  |
Cash proceeds | 383,148 |
Oceanica Resources S. de. R.L [Member] | First Tranche [Member] |  |
Debt Instrument [Line Items] |  |
Cash proceeds | 2,000,000 |
Oceanica Resources S. de. R.L [Member] | First Tranche [Member] | Deferred Income Call Option [Member] |  |
Debt Instrument [Line Items] |  |
Cash proceeds | 67,241 |
Oceanica Resources S. de. R.L [Member] | Second Tranche [Member] |  |
Debt Instrument [Line Items] |  |
Cash proceeds | 6,000,000 |
Oceanica Resources S. de. R.L [Member] | Second Tranche [Member] | Deferred Income Call Option [Member] |  |
Debt Instrument [Line Items] |  |
Cash proceeds | 173,659 |
Oceanica Resources S. de. R.L [Member] | Third Tranche [Member] |  |
Debt Instrument [Line Items] |  |
Cash proceeds | 3,000,000 |
Oceanica Resources S. de. R.L [Member] | Third Tranche [Member] | Deferred Income Call Option [Member] |  |
Debt Instrument [Line Items] |  |
Cash proceeds | 75,828 |
Oceanica Resources S. de. R.L [Member] | Fourth Tranche [Member] |  |
Debt Instrument [Line Items] |  |
Cash proceeds | 2,000,000 |
Oceanica Resources S. de. R.L [Member] | Fourth Tranche [Member] | Deferred Income Call Option [Member] |  |
Debt Instrument [Line Items] |  |
Cash proceeds | 39,911 |
Oceanica Resources S. de. R.L [Member] | Fifth Tranche [Member] |  |
Debt Instrument [Line Items] |  |
Cash proceeds | 1,750,000 |
Oceanica Resources S. de. R.L [Member] | Fifth Tranche [Member] | Deferred Income Call Option [Member] |  |
Debt Instrument [Line Items] |  |
Cash proceeds | 26,509 |
Oceanica Resources S. de. R.L [Member] | 2014 Convertible Promissory Notes [Member] |  |
Debt Instrument [Line Items] |  |
Cash proceeds | 14,366,852 |
Oceanica Resources S. de. R.L [Member] | 2014 Convertible Promissory Notes [Member] | First Tranche [Member] |  |
Debt Instrument [Line Items] |  |
Cash proceeds | 1,932,759 |
Oceanica Resources S. de. R.L [Member] | 2014 Convertible Promissory Notes [Member] | Second Tranche [Member] |  |
Debt Instrument [Line Items] |  |
Cash proceeds | 5,826,341 |
Oceanica Resources S. de. R.L [Member] | 2014 Convertible Promissory Notes [Member] | Third Tranche [Member] |  |
Debt Instrument [Line Items] |  |
Cash proceeds | 2,924,172 |
Oceanica Resources S. de. R.L [Member] | 2014 Convertible Promissory Notes [Member] | Fourth Tranche [Member] |  |
Debt Instrument [Line Items] |  |
Cash proceeds | 1,960,089 |
Oceanica Resources S. de. R.L [Member] | 2014 Convertible Promissory Notes [Member] | Fifth Tranche [Member] |  |
Debt Instrument [Line Items] |  |
Cash proceeds | $ 1,723,491 |

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