Tabular disclosure of the recognition of revenue arrangements under which the entity does or will perform multiple revenue-generating activities, categorized by type of arrangement. This item includes certain revenue arrangements that include software elements. This item does not include multiple-deliverable arrangements for industries that prepare disclosures under specific requirements (for instance, construction-type and production-type contract) otherwise provided for in the taxonomy.

No definition available.

Name:	crbo_RevenueRecognitionMultipleDeliverableArrangementTableTextBlock
Namespace Prefix:	crbo_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration