Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	6 Months Ended
Dec. 31, 2010	Jun. 30, 2012
Commitments and Contingencies (Additional Textual) [Abstract]
Minimum term of non-cancelable operating leases		1 year
Expiration of non-cancelable operating leases maximum year		2019
Financing for leasehold improvement	$ 1.1
Outstanding liability related to leasehold improvements		0.9
Leasehold Improvement reflected to Accrued liabilities		0.1
Leasehold Improvement reflected in Other non-current liabilities		$ 0.8
Concord Lease [Member]
Commitments and Contingencies (Textual) [Abstract]
Early termination of non cancelable operating leases minimum period		2015-01

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Earliest period for early termination of non-cancelable operating lease.

No definition available.

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Latest period of expiration of non-cancelable operating lease.

No definition available.

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Portion of outstanding liability related to leasehold improvement reflected in accrued liabilities.

No definition available.

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Portion of outstanding liability related to leasehold improvement reflected in other non current liabilities.

No definition available.

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Minimum term of non-cancelable operating lease.

No definition available.

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Outstanding liability related to leasehold improvements current and non current.

No definition available.

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Proceeds from landlord for financing leasehold improvement.

No definition available.

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