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Commitments and Contingencies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Commitments And Contingencies Disclosure [Abstract]
Accrued partner program royalties	$ 974us-gaap_AccruedRoyaltiesCurrent

Carrying value as of the balance sheet date of obligations incurred through that date and payable for royalties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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