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Commitments and Contingencies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Commitments And Contingencies Disclosure [Abstract]
Operating leases expenses	$ 768	$ 368	$ 1,594	$ 730
Period in which office lease expires			Jan. 01, 2014
New lease agreement term			16 years
New lease agreement date			2013-08
Lease incentives received including a deferred rent period and a leasehold improvement allowance	3,223		3,223
Leasehold improvement allowance	509		509		3,223
Stand by letter of credit decreased			$ 1,384		$ 1,803

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This item represents the deferred credit for an incentive or inducement received by a lessee from a lessor, in order to motivate the lessee to enter the lease agreement, which incentive or inducement is to be recognized as a reduction of rental expense over the lease term.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 25

-Paragraph 6

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-Publisher FASB

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Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

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Date which lease or group of leases is set to expire, in CCYY-MM-DD format.

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This item represents a receivable for an incentive or inducement contractually stipulated between parties to a lease whereby the lessor has committed to provide the entity (lessee) with a cash payment as inducement to enter the lease.

+ References

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Term of the lessee's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Letters of credit decreased amount.

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Operating Lease Agreement Date

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