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Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($) | Mar. 31, 2019 | Dec. 31, 2018
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Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |  |
Land and property deposits (Note 15) | $ 2,100,000 | $ 1,800,000
Surety bond and insurance | 342,758 | 475,861
Reimbursements due from Tonogold | 119,541 | 82,951
Other | 312,543 | 353,390
Total prepaid expenses and other current assets | $ 2,874,842 | $ 2,712,202

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