Commitments and Contingencies - Summary of Restructuring Activity (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Restructuring Cost and Reserve [Line Items]
Accrual, Beginning Balance			$ 0
Restructuring Expense	$ 413	$ 0	852	$ 0
Payments/Charges			(823)
Accrual, Ending Balance	29		29
Employee Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Accrual, Beginning Balance			0
Restructuring Expense			423
Payments/Charges			(394)
Accrual, Ending Balance	29		29
Disposal of Fixed Assets [Member]
Restructuring Cost and Reserve [Line Items]
Accrual, Beginning Balance			0
Restructuring Expense			23
Payments/Charges			(23)
Accrual, Ending Balance	0		0
Intangible Assets Adjustment [Member]
Restructuring Cost and Reserve [Line Items]
Accrual, Beginning Balance			0
Restructuring Expense			406
Payments/Charges			(406)
Accrual, Ending Balance	$ 0		$ 0