| Standard label: | Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration |
| Name: | us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration |
| Documentation: | Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards that are subject to expiration dates. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration |
| Label | Role | Language |
| Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |