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Related Party Transactions (Details 1) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Amount charged on Leased premises | $ 282 | $ 148
White Plains, NY [Member] |  |
Amount charged on Leased premises | 126 | 122
Los Angeles, CA [Member] |  |
Amount charged on Leased premises | 26 | 26
Foster City, CA [Member] |  |
Amount charged on Leased premises | $ 130 | $ 0

X
- Definition Amount of lease expense paid to related party during the financial reporting period. + References No definition available. + Details
Name: | crbn_LeaseExpensePaidToRelatedParty
Namespace Prefix: | crbn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration