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Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses (Details) - USD ($)
Mar. 31, 2019
Dec. 31, 2018
Payables and Accruals [Abstract]    
Advance deposits on Membership Interest Purchase Agreement (Note 15) $ 1,950,000 $ 0
Accrued Northern Comstock Joint Venture 293,958 180,833
Accrued insurance liabilities 239,176 341,680
Accrued interest expense 204,658 481,946
Accrued payroll costs 153,482 140,915
Accrued liability for purchase of DTSS (Note 15) 120,000 185,000
Accrued Board of Directors fees 20,000 20,000
Accrued make-whole for Pelen LLC (Note 15) 0 135,162
Accrued personal property tax 0 74,434
Other accrued expenses 121,863 114,763
Total accrued expenses and other liabilities $ 3,103,137 $ 1,674,733