Organization and Nature of Operations (Details)	Dec. 31, 2012
Organization and Nature of Operations
Production profile percentage of balance of crude oil and natural gas liquids in relation to total production	0.50

Represents the weighted production profile, reflected as a percentage of balance of crude oil and natural gas liquids in relation to total production.

No definition available.

Name:	cxpo_ProductionProfilePercentage
Namespace Prefix:	cxpo_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant