| Standard label: | Share-based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding |
| Name: | us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions |
| Documentation: | The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices. |
| Object type: | cm:Concept |
| Data type: | Shares (xbrli:sharesItemType) |
| Period type: | As Of (instant) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions |
| Label | Role | Language |
| Share-based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding | http://www.xbrl.org/2003/role/label | en-US |
| Share-based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding, Ending Balance | http://www.xbrl.org/2003/role/periodEndLabel | en-US |
| Share-based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding, Beginning Balance | http://www.xbrl.org/2003/role/periodStartLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 718 10 50 2 (c)(1)(i)-(ii) | http://fasb.org/us-gaap/role/ref/legacyRef | 718 |