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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

X
- Definition The amount of gross profit (loss) reported by an Asset Liquidation Investment of the Company, and attributable to the Company as its share. + References No definition available. + Details
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Namespace Prefix: | crbn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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X
- Definition 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. + References No definition available. + Details
Name: | crbn_AssetLiquidationInvestmentSummarizedFinancialInformationIncomeLossFromContinuingOperationsBeforeExtraordinaryItems
Namespace Prefix: | crbn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of revenue from sale of goods and services, reduced by sales returns, allowances, and discounts, reported by an Asset Liquidation Investment of the Company, and attributable to the Company as its share. + References No definition available. + Details
Name: | crbn_AssetLiquidationInvestmentSummarizedFinancialInformationRevenue
Namespace Prefix: | crbn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Company's proportionate share of Joint Ventures' net income (loss) reported in the consolidated statement of operations as Earnings (Loss) of Equity Accounted Asset Liquidation Investments. + References No definition available. + Details
Name: | crbn_EarningsOfEquityAccountedAssetLiquidationInvestments
Namespace Prefix: | crbn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration