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v3.20.2

ASSET RETIREMENT OBLIGATION (Details) $ in Millions | Sep. 30, 2020 USD ($)
--- | ---
Collateral amount in form of restricted cash | $ 3.8
EnCore Energy Corp |
Reclamation liability to be transferred | 6.0
Discontinued Operations, Held-for-sale [Member] |
Reclamation performance obligation bonds | $ 9.3

X
- Definition The amount of reclamation liability to be transferred. + References No definition available. + Details
Name: | wwr_ReclamationLiabilityToBeTransferred
Namespace Prefix: | wwr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The carrying amount of reclamation performance obligation bonds. + References No definition available. + Details
Name: | wwr_ReclamationPerformanceObligationBonds
Namespace Prefix: | wwr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of restricted cash pledged as collateral. + References No definition available. + Details
Name: | wwr_RestrictedCashPledgedAsCollateral
Namespace Prefix: | wwr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | dei_LegalEntityAxis=wwr_EncoreEnergyCorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DisposalGroupClassificationAxis=us-gaap_DiscontinuedOperationsHeldforsaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |