Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Excess tax benefits from share-based compensation	$ 626	$ 140	$ (336)
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	7,031	2,696
Tax credit carryforwards valuation allowance	7,477	6,882
Goodwill impairment impact on income tax provision	7,200
Federal research and development tax credit benefits recognized	2,600	2,400	2,000
Tax credits for the year			4,500
Interest and penalties accrued	100	100	100
Unrecognized tax benefits	2,963	$ 2,803	$ 2,297	$ 1,356
Unrecognized tax benefits that would impact effective tax rate	2,100
Federal
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	7,900
State
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	10,000
Tax credit carryforwards valuation allowance	9,100
Net operating loss carryforwards	30,200
Net operating loss carryforwards valuation allowance	$ 27,100