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Stock-Based Compensation (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Options, Unvested	2,350,000	97,500
Options, Granted	1,040,000	2,520,000
Options, Vested	(540,000)	(267,500)
Options, Forfeited	(250,000)
Options, Unvested	2,600,000	2,350,000
Weighted Average Grant Date Fair Value, Unvested	$ 0.83	$ 0.29
Weighted Average Grant Date Fair Value, Granted	$ 1.75	$ 0.93
Weighted Average Grant Date Fair Value, Vested	$ 0.87	$ 1.77
Weighted Average Grant Date Fair Value, Forfeited	$ 0.20
Weighted Average Grant Date Fair Value, Unvested	$ 1.23	$ 0.83

X

- Definition

The number of non-vested stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

No definition available.

+ Details

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X

- Definition

The weighted average fair value of non vested options for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain rights to exercise the options.

+ References

No definition available.

+ Details

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X

- Definition

The number of stock (or unit) options, that vested during the reporting period.

+ References

No definition available.

+ Details

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Namespace Prefix:	crbn_
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X

- Definition

The weighted average fair value as of grant date pertaining to a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

+ References

No definition available.

+ Details

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X

- Definition

Number of unvested shares under option equity instrument agreements that were forfeited during the period.

+ References

No definition available.

+ Details

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X

- Definition

The weighted average grant-date fair value of non vested options forfeited during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

No definition available.

+ Details

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X

- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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X

- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph c(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (d)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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