| Schdule of mineral properties |
Mineral Properties |
|
Lost Creek
Property
|
|
|
Shirley Basin
Project
|
|
|
Other U.S.
Properties
|
|
|
Total |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
December 31, 2019 |
|
|
10,184 |
|
|
|
17,437 |
|
|
|
15,591 |
|
|
|
43,212 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Change in estimated reclamation costs |
|
|
(1,463 |
) |
|
|
(120 |
) |
|
|
- |
|
|
|
(1,583 |
) |
Depletion and amortization |
|
|
(2,445 |
) |
|
|
- |
|
|
|
- |
|
|
|
(2,445 |
) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
December 31, 2020 |
|
|
6,276 |
|
|
|
17,317 |
|
|
|
15,591 |
|
|
|
39,184 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Change in estimated reclamation costs |
|
|
296 |
|
|
|
45 |
|
|
|
(877 |
) |
|
|
(536 |
) |
Reclassify assets held for sale |
|
|
- |
|
|
|
- |
|
|
|
(1,536 |
) |
|
|
(1,536 |
) |
Depletion and amortization |
|
|
(2,045 |
) |
|
|
- |
|
|
|
- |
|
|
|
(2,045 |
) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
December 31, 2021 |
|
|
4,527 |
|
|
|
17,362 |
|
|
|
13,178 |
|
|
|
35,067 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Reclassify assets no longer held for sale |
|
|
- |
|
|
|
- |
|
|
|
1,536 |
|
|
|
1,536 |
|
Change in estimated reclamation costs |
|
|
- |
|
|
|
326 |
|
|
|
- |
|
|
|
326 |
|
Depletion and amortization |
|
|
(1,247 |
) |
|
|
- |
|
|
|
- |
|
|
|
(1,247 |
) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
December 31, 2022 |
|
|
3,280 |
|
|
|
17,688 |
|
|
|
14,714 |
|
|
|
35,682 |
|
|