| Standard label: | Call Option [Member] |
| Name: | us-gaap:CallOptionMember |
| Documentation: | Financial contract between two parties, the buyer and the seller of the option, where the buyer has the right but not the obligation to buy an agreed quantity of a particular commodity or financial instrument (the underlying instrument) from the seller of the option for a certain price (the strike price). Seller is obligated to sell the asset to the buyer, if the buyer exercises the option. |
| Object type: | cm:Member |
| Data type: | [Member] (nonnum:domainItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:CallOptionMember |
| Label | Role | Language |
| Call Option [Member] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |