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ORGANIZATION - COVID-19 (Details) - USD ($) $ in Thousands |  | 1 Months Ended | 3 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 29, 2021 | Mar. 31, 2021 | Mar. 31, 2021 | Feb. 12, 2021 | Dec. 31, 2020 | Mar. 31, 2020 | Dec. 31, 2019
Cash, Equivalents, and restricted cash |  | $ 277,928 | $ 277,928 |  | $ 37,698 | $ 24,317 | $ 29,851
Restricted cash |  | 179,923 | 179,923 |  |  |  |
Revolving Credit Facility |  |  |  |  |  |  |
Agreement of revolving credit facility |  | $ 15,000 | $ 15,000 |  |  |  |
Term of unsecured note |  | 5 years | 5 years |  |  |  |
Over-Allotment Option |  |  |  |  |  |  |
Underwritten public offering | 6,917,250 | 6,917,250 |  |  |  |  |
Gross proceeds | $ 43,000 | $ 46,000 |  |  |  |  |
Cripple Creek Project |  |  |  |  |  |  |
Restricted cash account |  | $ 180,000 | $ 180,000 |  |  |  |
Senior Secured Notes Due 2028 | Senior Secured Notes |  |  |  |  |  |  |
Amount of debt |  |  |  | $ 310,000 |  |  |
Interest rate |  |  |  | 8.25% |  |  |

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