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Deferred Income and Revenue Participation Rights - Additional Information (Detail)
 1 Months Ended 12 Months Ended
Feb. 28, 2011
USD ($)
Dec. 31, 2021
USD ($)
Investment
Project
$ / Security
shares
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Deferred Revenue Arrangement [Line Items]        
Deferred revenue   $ 3,818,750 $ 0 $ 825,000
Revenue participation agreement   $ 15,000,000.0    
"Seattle" Project [Member]        
Deferred Revenue Arrangement [Line Items]        
Percentage of revenue owed to certificate holder per each million invested   1.00%    
Common shares issued per unit | shares   100,000    
Galt Resources, LLC [Member]        
Deferred Revenue Arrangement [Line Items]        
Percentage of revenue owed to certificate holders   50.00%    
Percentage of revenue owed to certificate holder per each million invested   1.00%    
Investment multiplier in case of project success | Investment   3    
Projects after bifurcation | Project   2    
Galt Resources, LLC [Member] | SS Gairsoppa [Member]        
Deferred Revenue Arrangement [Line Items]        
Deferred revenue   $ 3,756,250    
Galt Resources, LLC [Member] | Maximum [Member]        
Deferred Revenue Arrangement [Line Items]        
Investment for future revenue rights $ 7,512,500      
HMS Victory Project [Member]        
Deferred Revenue Arrangement [Line Items]        
Percentage of revenue owed to certificate holders   7.5125%    
Revenue Participation Certificates [Member] | "Seattle" Project [Member]        
Deferred Revenue Arrangement [Line Items]        
Revenue participation certificates per unit value | $ / Security   50,000