Asset Liquidation Investments and Other Investments (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Gross revenues	$ 8,666	$ 3,505
Gross profit	2,099	2,201
Income from continuing operations	2,023	2,183
Net income	$ 2,023	$ 2,183

The amount of income (loss) from continuing operations before extraordinary items reported by an asset liquidation investment of the entity and attributable to the Company.

No definition available.

Name:	crbn_AssetLiquidationInvestmentSummarizedFinancialInformationIncomeLossFromContinuingOperationsBeforeExtraordinaryItems
Namespace Prefix:	crbn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration