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LIQUIDITY (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Oct. 01, 2021 | Sep. 30, 2021 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Cash balances |  | $ 118,969 | $ 118,969 | $ 5,480 | $ 50,315
Issuance of common stock, net |  |  | $ 81,865 | $ 13,530 |
Cantor |  |  |  |  |
Number of common stock issued | 637,200 |  |  |  |
Issuance of common stock, net | $ 2,300 |  |  |  |
Cantor | Controlled Equity Offering Sales Agreement |  |  |  |  |
Number of common stock issued |  |  | 9,300,000 |  |
Issuance of common stock, net |  |  | $ 47,300 |  |
Lincoln Park | December 2020 PA |  |  |  |  |
Number of common stock issued |  | 1,100,000 | 6,100,000 |  |
Issuance of common stock, net |  | $ 4,000 | $ 34,600 |  |
Amount available for future sales |  | $ 50,000 | $ 50,000 |  |
Registered share available for future sales |  | 9,700,252 | 9,700,252 |  |
enCore |  |  |  |  |
Elimination of bonding liability |  |  |  |  | 9,300
Elimination of asset retirement obligations |  |  |  |  | 5,200
Annual expenditures related to reclamation and compliance costs |  |  |  |  | 4,000
Common stock received and royalty interest retained |  |  |  |  | $ 1,800
Issuance of common stock, net | $ 3,600 |  |  |  |

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