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Acquisition Agreements - (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended 11 Months Ended 12 Months Ended
Apr. 24, 2020
Apr. 10, 2020
Jul. 18, 2019
Jul. 03, 2019
Nov. 30, 2018
Jan. 31, 2018
Sep. 30, 2020
Jun. 30, 2020
Jun. 30, 2020
Dec. 31, 2019
May 15, 2020
Sep. 26, 2019
May 30, 2018
Business Acquisition [Line Items]                          
Total purchase price $ 600,000                        
Total assets held for sale               $ 10,512,066 $ 10,512,066 $ 10,512,066      
Impairment expense                   500,000      
Downtown Silver Springs, LLC Equity Purchase Agreement                          
Business Acquisition [Line Items]                          
Percentage of voting interests acquired                         100.00%
Payments to purchase land                   4,100,000      
Payments toward the purchase price of land parcel                   3,100,000      
Payments to acquire land, interest and closing costs                   500,000      
Required payments to sellers of membership interests                   500,000      
Purchase option, water and sewer rights               3,600,000 3,600,000     $ 3,600,000  
Payments for deposits on real estate acquisitions               400,000          
Pelen LLC                          
Business Acquisition [Line Items]                          
Membership interest 25.00%         25.00%              
Sutro Tunnel Company                          
Business Acquisition [Line Items]                          
Ownership percentage           100.00%              
Joint Venture, Philippine And Comstock Lode Mercury                          
Business Acquisition [Line Items]                          
Equity method, fully diluted equity ownership   50.00%                      
Corporate Joint Venture                          
Business Acquisition [Line Items]                          
Capital contribution, total       $ 2,000,000.0                  
Capital contribution, cash   $ 100,000 $ 500,000 1,150,000                  
Capital contribution, stock   $ 2,000,000 $ 751,050 $ 850,000                  
Equity method, fully diluted equity ownership   25.00%   15.00%                  
Percent interest in joint venture       50.00%                  
Joint venture, common stock issued (in shares)     900,000               625,000    
Payment to acquire interest in joint venture                 900,000        
Contingent joint venture capital contribution       $ 3,000,000.0                  
Contingent equity method fully diluted equity ownership       10.00%                  
Secured loan incurred   $ 1,000,000                      
Member of Pelen, LLC | Restricted Stock                          
Business Acquisition [Line Items]                          
Common stock, shares issued (in shares)         351,637 295,082              
Forecast | Corporate Joint Venture                          
Business Acquisition [Line Items]                          
Payment to acquire interest in joint venture             $ 250,000            
Disposal Group, Held-for-sale, Not Discontinued Operations                          
Business Acquisition [Line Items]                          
Total assets held for sale               10,512,066 10,512,066 10,512,066      
Disposal Group, Held-for-sale, Not Discontinued Operations | DTSS (Land)                          
Business Acquisition [Line Items]                          
Total assets held for sale               $ 3,589,876 $ 3,589,876 $ 3,589,876   $ 3,600,000