DISCONTINUED OPERATIONS (Details) - USD ($) $ in Millions	Sep. 01, 2020	Sep. 30, 2020
Discontinued Operations, Held-for-sale or Disposed of by Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration	$ 2.0
Cash collateral pledged	3.0
Reclamation performance obligation bonds	$ 9.3
Period with in which sale is expected to be completed	1 year
Discontinued Operations, Held-for-sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Reclamation performance obligation bonds		$ 9.3

- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

+ Details

Name:	us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of cash collateral currently pledged against reclamation performance obligation bonds payable under the discontinued operations arrangement.

+ References

No definition available.

+ Details

Name:	wwr_DisposalGroupIncludingDiscontinuedOperationCashCollateralPayable
Namespace Prefix:	wwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Period with in which the sale of assets held for sale is expected to be completed.

+ References

No definition available.

+ Details

Name:	wwr_DisposalGroupIncludingDiscontinuedOperationPeriodWithInWhichSaleIsExpectedToBeCompleted
Namespace Prefix:	wwr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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

- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DiscontinuedOperationsHeldForSaleOrDisposedOfBySaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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