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Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($)
Sep. 30, 2019
Dec. 31, 2018
Related Party Transaction [Line Items]    
Land and property deposits (Note 15) $ 3,250,000 $ 1,800,000
Reimbursements due from Tonogold 451,566 82,951
Surety bond and insurance 180,766 475,861
Other 248,737 353,390
Total prepaid expenses and other current assets 5,232,119 2,712,202
Corporate Joint Venture    
Related Party Transaction [Line Items]    
Prepaid investment, current $ 1,101,050 $ 0