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Loans Payable - Note 1 - Monaco 2014 - Additional Information (Detail) - Note 1- Monaco 2014 [Member] - USD ($) |  |  | 1 Months Ended | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 10, 2015 | Aug. 14, 2014 | Mar. 31, 2016 | Jun. 30, 2018 | Apr. 01, 2018 | Dec. 01, 2014 | Oct. 01, 2014
Debt Instrument [Line Items] |  |  |  |  |  |  |
Aggregate amount issuable |  | $ 10,000,000 |  |  |  |  |
Interest rate, stated percentage |  | 11.00% |  |  |  |  |
Extinguishment of debt, amount | $ 2,200,000 |  |  |  |  |  |
Notes ceased to bear interest, amount | $ 5,000,000 |  |  |  |  |  |
Debt instrument maturity date | Dec. 31, 2017 |  | Apr. 01, 2018 |  |  |  |
Debt default interest rate |  |  |  |  | 18.00% |  |
Outstanding notes balance |  |  |  | $ 2,800,000 |  |  |
Debt, interest expense |  |  |  | $ 142,885 |  |  |
Oceanica Resources S. de. R.L [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Per share value of shares purchased by private investor |  | $ 3.15 |  |  |  |  |
Aggregate value of shares issued to lender |  | $ 1,000,000 |  |  |  |  |
Oceanica Resources S. de. R.L [Member] | Loan Modification March Two Thousand Sixteen [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Per share value of shares purchased by private investor |  |  | $ 1.00 |  |  |  |
First Tranche [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Loan amount borrowed |  | $ 5,000,000 |  |  |  |  |
Second Tranche [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Loan amount borrowed |  |  |  |  |  |  | $ 2,500,000
Third Tranche [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Loan amount borrowed |  |  |  |  |  | $ 2,500,000 |

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