Mineral Properties (Details) |
3 Months Ended |
|---|---|
|
Mar. 31, 2022
USD ($)
| |
| Balance At Beginning Of Period | $ 35,067,000 |
| Depletion And Amortization | 312,000 |
| Balance At End Of Period | 34,755,000 |
| Lost Creek Property [Member] | |
| Balance At Beginning Of Period | 4,527,000 |
| Depletion And Amortization | 312,000 |
| Balance At End Of Period | 4,215,000 |
| Pathfinder Properties [Member] | |
| Balance At Beginning Of Period | 17,362,000 |
| Depletion And Amortization | 0 |
| Balance At End Of Period | 17,362,000 |
| Other U.S. Properties [Member] | |
| Balance At Beginning Of Period | 13,178,000 |
| Depletion And Amortization | 0 |
| Balance At End Of Period | $ 13,178,000 |