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Loans Payable - Note 1 - Monaco 2014 - Additional Information (Detail) - USD ($)	Dec. 10, 2015	Aug. 14, 2014	Sep. 30, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 01, 2014	Oct. 01, 2014	Dec. 31, 2013	May 10, 2012
Debt Instrument [Line Items]
Aggregate amount issuable									$ 8,000,000
Loan amount borrowed			$ 0
Oceanica Resources S. de. R.L [Member]
Debt Instrument [Line Items]
Per share value of shares purchased by private investor								$ 2.50
Note1- Monaco 2014 [Member]
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
Outstanding notes balance			$ 2,800,000	$ 2,800,000
Note1- Monaco 2014 [Member] | 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
Note1- Monaco 2014 [Member] | 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
Note1- Monaco 2014 [Member] | First Tranche [Member]
Debt Instrument [Line Items]
Loan amount borrowed		$ 5,000,000
Note1- Monaco 2014 [Member] | Second Tranche [Member]
Debt Instrument [Line Items]
Loan amount borrowed							$ 2,500,000
Note1- Monaco 2014 [Member] | Third Tranche [Member]
Debt Instrument [Line Items]
Loan amount borrowed						$ 2,500,000

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