Schedule of results of operations attributable to the company from the Joint Ventures in which it is invested (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Gross revenues			$ 2,266	$ 5,026
Gross profit			775	1,237
Income from continuing operations			809	1,227
Net income	$ 7	$ 158	$ 809	$ 1,227

The amount of income (loss) from continuing operations, before extraordinary items, reported by an Asset Liquidation Investment of the Company, and attributable to the Company as its share.

No definition available.

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