| Standard label: | Stock Option, Down Round Feature, Trigger [true false] | 
| Name: | us-gaap:StockOptionDownRoundFeatureTrigger | 
| Documentation: | Indicates (true false) whether down round feature was triggered for option classified as equity. Excludes stock option granted for share-based compensation. | 
| Object type: | cm:Concept | 
| Data type: | Yes/No (xbrli:booleanItemType) | 
| Period type: | For Period (duration) | 
| Balance type: | (no balance type) | 
| Abstract: | false | 
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:StockOptionDownRoundFeatureTrigger | 
| Label | Role | Language | 
| Stock Option, Down Round Feature, Trigger [true false] | http://www.xbrl.org/2003/role/label | en-US | 
| Reference | Role | Topic | 
| FASB Accounting Standards Codification 505 10 50 3A (a) | http://www.xbrl.org/2003/role/disclosureRef | 505 |