| Standard label: | Stock Option, Exercise Price, Decrease |
| Name: | us-gaap:StockOptionExercisePriceDecrease |
| Documentation: | Per share decrease in exercise price of option. Excludes change due to standard antidilution provision and option granted under share-based payment arrangement. |
| Object type: | cm:Concept |
| Data type: | Share (num:perShareItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:StockOptionExercisePriceDecrease |
| Label | Role | Language |
| Stock Option, Exercise Price, Decrease | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 505 10 50 3 | http://www.xbrl.org/2003/role/disclosureRef | 505 |