| Standard label: | Contract with Customer, Refund Liability, Current |
| Name: | us-gaap:ContractWithCustomerRefundLiabilityCurrent |
| Documentation: | Amount of liability for consideration received or receivable from customer which is not included in transaction price, when consideration is expected to be refunded to customer, classified as current. |
| 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:ContractWithCustomerRefundLiabilityCurrent |
| Label | Role | Language |
| Contract with Customer, Refund Liability, Current | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 606 10 55 27 | http://www.xbrl.org/2009/role/commonPracticeRef | 606 |
| Part Of Roll Up: |
| us-gaap:ContractWithCustomerRefundLiability |