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Commitments and Contingencies - Additional Information (Detail) - USD ($)
 1 Months Ended 3 Months Ended 12 Months Ended
Aug. 21, 2020
Mar. 11, 2015
Mar. 31, 2016
Feb. 28, 2011
Sep. 30, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Gain Contingencies [Line Items]                
Cash and cash equivalents           $ 6,163,205 $ 213,389  
Working capital deficit           47,000,000    
Total assets           11,759,464 5,329,720  
Cash Lease Obligation           548,912    
Lease Obligation           458,325    
Right Of Use Asset           $ 447,702    
Annual increases of base rent           3.00%    
Sale of stock, Number of shares issued in transaction 2,553,314              
Class of warrant or right, Number of securities called by warrants or rights 1,901,989              
Offering costs paid on sale of common stock $ 300,000         $ 89,642    
Net proceeds received from sale of stock 11,200,000         11,315,000   $ 4,561,739
Lease rent expense           194,000 $ 171,000  
Cover fees           200,000    
Common Stock [Member]                
Gain Contingencies [Line Items]                
Net proceeds received from sale of stock $ 11,300,000              
Building [Member]                
Gain Contingencies [Line Items]                
Lease Obligation           $ 590,612    
Rate Of Discount Used           10.00%    
Right Of Use Asset           $ 590,612    
Corporate Office Space [Member]                
Gain Contingencies [Line Items]                
Lease Obligation           $ 162,721    
Tenure Of Lease Agreement           5 years    
Right Of Use Asset           $ 159,337    
FLORIDA                
Gain Contingencies [Line Items]                
Effective Date Of Operating Lease Agreement           Oct. 01, 2019    
Cash Lease Obligation           $ 196,456    
Lease Obligation           $ 202,424    
Rate Of Discount Used           10.00%    
Tenure Of Lease Agreement           5 years    
Right Of Use Asset           $ 202,424    
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            
Cash Lease Obligation           6,200,000    
Oceanica Resources S. de. R.L [Member]                
Gain Contingencies [Line Items]                
Grant and potential future issuance of new equity shares     3,000,000          
Maximum [Member]                
Gain Contingencies [Line Items]                
Consultants contingent success fees     $ 700,000          
Maximum [Member] | Building [Member]                
Gain Contingencies [Line Items]                
Monthly Lease Payments           13,269    
Maximum [Member] | FLORIDA                
Gain Contingencies [Line Items]                
Monthly Lease Payments         $ 4,547      
Maximum [Member] | Galt Resources [Member]                
Gain Contingencies [Line Items]                
Investment for future revenue rights       $ 7,512,500        
Minimum [Member] | Building [Member]                
Gain Contingencies [Line Items]                
Monthly Lease Payments           $ 11,789    
Minimum [Member] | FLORIDA                
Gain Contingencies [Line Items]                
Monthly Lease Payments         $ 4,040      
Seattle and Cambridge Projects [Member]                
Gain Contingencies [Line Items]                
Deferred income from revenue participation rights               $ 62,500