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Related Party Transactions (Details 1) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Amount charged on Leased Premises | $ 96 | $ 49
White Plains, NY [Member] |  |
Amount charged on Leased Premises | 33 | 32
Los Angeles, CA [Member] |  |
Amount charged on Leased Premises | 6 | 6
Foster City, CA [Member] |  |
Amount charged on Leased Premises | $ 57 | $ 11

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