| Standard label: | Registration Payment Arrangement, Accrual Carrying Value |
| Name: | us-gaap:RegistrationPaymentArrangementAccrualCarryingValue |
| Documentation: | The carrying amount as of the balance sheet date of the liability representing the obligation under the registration payment arrangement. |
| 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:RegistrationPaymentArrangementAccrualCarryingValue |
| Label | Role | Language |
| Registration Payment Arrangement, Accrual Carrying Value | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 825 20 50 1 (e) | http://fasb.org/us-gaap/role/ref/legacyRef | 825 |