Consolidated Deferred Tax Assets (Liabilities) (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Temporary timing differences:
Stock-based compensation expense	$ 2,922	$ 2,874
Contingent consideration	2,206	2,263
Operating leases	7,295
Accrued bonus	1,379	3
Other	4,994	3,585
Total temporary timing differences	18,796	8,725
Net operating loss carryforwards	221
Tax business credits carryforwards	924	2,004
Total deferred tax assets	19,941	10,729
Less: valuation allowance	(6)	(131)
Net deferred tax assets	19,935	10,598
Deferred tax liabilities:
Goodwill	(1,288)	(1,076)
Fixed assets	(1,650)	(956)
Acquired intangible assets	(26,811)	(26,903)
Operating lease right of use assets	(6,144)
Conversion option on convertible notes	(11,066)	(2,394)
Total deferred tax liabilities	(46,959)	(31,329)
Total net deferred tax liabilities	$ (27,024)	$ (20,731)