Supplementary Disclosures of the Consolidated Statements of Cash Flows (Details) (USD $)	12 Months Ended
Dec. 31, 2010
Supplementary Disclosures of the Consolidated Statements of Cash Flows
Liabilities released on property dispositions	$ 351,092

Liabilities released on property dispositions in noncash investing and financing activities.

No definition available.

Name:	cxpo_LiabilitiesReleasedOnPropertyDispositions
Namespace Prefix:	cxpo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration