Long-term Reclamation Liability and Retirement Obligation Asset - Narrative (Details) - USD ($) |
12 Months Ended | |||
---|---|---|---|---|
Apr. 30, 2019 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
|
Regulatory Assets [Line Items] | ||||
Accrued long-term liability | $ 6,054,919 | $ 6,034,208 | $ 7,441,091 | |
Amount reclassified to liabilities held for sale | 0 | 1,019,705 | ||
Accretion of reclamation liability | 20,711 | 22,840 | ||
Amortization of retirement obligation asset | 57,963 | 67,758 | ||
Reduction of obligation | $ 400,000 | $ 0 | $ 410,018 | |
Industrial Park (Land and water rights) | Nevada Division of Environmental Protection | ||||
Regulatory Assets [Line Items] | ||||
Accrued long-term liability | $ 6,800,000 |