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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, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Oct. 04, 2021
Oct. 01, 2016
Other Commitments [Line Items]                      
Cash and cash equivalents           $ 2,274,751 $ 6,163,205        
Working capital deficit           49,300,000          
Total assets           8,908,887 11,759,464        
Lease Obligation           351,881          
Right Of Use Asset           $ 338,577          
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 1,901,985                    
Offering costs paid on sale of common stock $ 300,000                    
Net proceeds received from sale of stock 11,200,000         $ 0 11,315,000 $ 0      
Lease rent expense           216,000 $ 194,000        
Debt Instrument, Face Amount                     $ 3,000,000.0
Termination And Settlement Agreement [Member]                      
Other Commitments [Line Items]                      
Debt Instrument, Face Amount           14,500,000       $ 14,500,000  
Common Stock [Member]                      
Other Commitments [Line Items]                      
Net proceeds received from sale of stock $ 11,200,000                    
Building [Member]                      
Other Commitments [Line Items]                      
Lease Obligation           $ 590,612          
Rate Of Discount Used           10.00%          
Right Of Use Asset           $ 590,612          
Corporate Office Space [Member]                      
Other Commitments [Line Items]                      
Lease Obligation           $ 127,085          
Tenure Of Lease Agreement           5 years          
Right Of Use Asset           $ 122,532          
FLORIDA                      
Other Commitments [Line Items]                      
Effective Date Of Operating Lease Agreement           Oct. 01, 2019          
Cash Lease Obligation           $ 146,139          
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]                      
Other Commitments [Line Items]                      
Investment in convertible preferred stock   $ 101,000,000                  
Investment agreement period   3 years                  
MINOSA [Member]                      
Other Commitments [Line Items]                      
Amount of debt financed   $ 14,750,000                  
Cash Lease Obligation           2,300,000          
Oceanica Resources S. de. R.L [Member]                      
Other Commitments [Line Items]                      
Grant and potential future issuance of new equity shares     3,000,000.0                
Maximum [Member]                      
Other Commitments [Line Items]                      
Consultants contingent success fees     $ 700,000                
Maximum [Member] | Building [Member]                      
Other Commitments [Line Items]                      
Monthly Lease Payments           13,269          
Maximum [Member] | FLORIDA                      
Other Commitments [Line Items]                      
Monthly Lease Payments         $ 4,547            
Maximum [Member] | Galt Resources [Member]                      
Other Commitments [Line Items]                      
Investment for future revenue rights       $ 7,512,500              
Minimum [Member] | Building [Member]                      
Other Commitments [Line Items]                      
Monthly Lease Payments           $ 11,789          
Minimum [Member] | FLORIDA                      
Other Commitments [Line Items]                      
Monthly Lease Payments         $ 4,040            
Seattle and Cambridge Projects [Member]                      
Other Commitments [Line Items]                      
Deferred income from revenue participation rights                 $ 62,500