Commitments And Contingencies - Additional Information (Detail) ft² in Thousands, $ in Thousands	Jan. 26, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 01, 2015 ft²
Non-cancelable purchase commitments
Long-term Purchase Commitment [Line Items]
Purchase commitments for less than one year		$ 24,191
Andover, Massachusetts Lease [Member]
Long-term Purchase Commitment [Line Items]
Operating Leases, Future Minimum Payments Due		$ 21,070
Area of Leased Property (in sq feet) | ft²			114
Andover, Massachusetts Lease [Member] | Pro Forma [Member]
Long-term Purchase Commitment [Line Items]
Area of Leased Property (in sq feet) | ft²			145
Subsequent Event [Member] | Indemnification Agreement [Member]
Long-term Purchase Commitment [Line Items]
Proceeds from Other Deposits	$ 175