| Standard label: | Operating Loss Carryforwards, Valuation Allowance |
| Name: | us-gaap:OperatingLossCarryforwardsValuationAllowance |
| Documentation: | The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:OperatingLossCarryforwardsValuationAllowance |
| Label | Role | Language |
| Operating Loss Carryforwards, Valuation Allowance | http://www.xbrl.org/2003/role/label | en-US |
| Operating Loss Carryforwards, Valuation Allowance, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 740 10 50 2 (c) | http://fasb.org/us-gaap/role/ref/legacyRef | 740 |
| FASB Accounting Standards Codification 740 10 50 3 (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 740 |
| FASB Accounting Standards Codification 740 10 30 5 (e) | http://fasb.org/us-gaap/role/ref/legacyRef | 740 |