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Commitments and Contingencies - Additional Information (Detail) - USD ($)
shares in Millions
Mar. 11, 2015
Mar. 31, 2016
Dec. 31, 2015
Mar. 31, 2015
Dec. 31, 2014
Gain Contingencies [Line Items]          
Cash and cash equivalents   $ 2,765,215 $ 2,241,317 $ 704,452 $ 3,143,550
Working capital deficit   19,000,000      
Total assets   $ 7,244,351 $ 6,913,016    
Penelope Mining LLC [Member]          
Gain Contingencies [Line Items]          
Investment in convertible preferred stock $ 101,000,000        
Investment agreement period 3 years        
MINOSA [Member]          
Gain Contingencies [Line Items]          
Amount of debt financed $ 14,750,000        
Oceanica Resources S. de. R.L [Member]          
Gain Contingencies [Line Items]          
Grant and issuance of new equity shares   3.0