Mineral Properties (Details) - USD ($) $ in Thousands |
1 Months Ended | 3 Months Ended | 12 Months Ended | |
|---|---|---|---|---|
Dec. 31, 2013 |
Mar. 31, 2019 |
Mar. 31, 2018 |
Dec. 31, 2005 |
|
| Aggregate consideration | $ 6,700 | |||
| Revenue, Net, Total | $ 4,812 | $ 19,672 | ||
| Royalty (as a percent) | 5.00% | |||
| Estimated asset reclamation obligation | $ 5,700 | |||
| Nfu Wyoming LLC | ||||
| Percentage of asset acquired | 100.00% | |||
| Aggregate consideration | $ 20,000 | |||
| X | ||||||||||
- Definition This element represents that Mineral Properties Acquired Percentage. No definition available.
|
| X | ||||||||||
- Definition Represents the percentage of royalty exists with respect to future production of uranium on mining claims. No definition available.
|
| X | ||||||||||
- Definition Amount of other liabilities due after one year or the normal operating cycle, if longer, assumed at the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|