Income Taxes - Components of Deferred Income Taxes (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Non-deductible reserves and accruals	$ 2,743	$ 3,835
Net operating loss and other carryforwards	13,049	7,954
Stock compensation	2,651	2,125
Depreciation and amortization		727
Lease liability	17,382
Gross deferred tax asset	35,825	14,641
Less - valuation allowance	(2,274)	(2,574)	$ (2,686)	$ (2,193)
Sub-total	33,551	12,067
Other liabilities	(1,085)	(1,249)
Depreciation and amortization	(1,567)
Goodwill and intangible assets	(32,120)	(6,201)
Operating lease right-of-use assets	(15,005)
Deferred commissions	(5,706)	(4,479)
Net deferred tax asset (liability)		$ 138
Deferred tax liability	$ (21,932)