Consolidated Deferred Tax Assets (Liabilities) (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Temporary timing differences:
Stock-based compensation expense	$ 3,320	$ 2,922
Operating leases	7,257	7,295
Accrued bonus	25	1,379
Other	5,749	4,994
Total temporary timing differences	16,351	16,590
Net operating loss carryforwards	1,539	221
Tax business credits carryforwards	5,553	924
Total deferred tax assets	23,443	17,735
Less: valuation allowance	(727)	(6)
Net deferred tax assets	22,716	17,729
Deferred tax liabilities:
Goodwill	(1,487)	(1,288)
Fixed assets	(4,233)	(1,650)
Acquired intangible assets	(27,152)	(24,605)
Operating lease right of use assets	(5,744)	(6,144)
Conversion option on convertible notes	(8,651)	(11,066)
Total deferred tax liabilities	(47,267)	(44,753)
Total net deferred tax liabilities	$ (24,551)	$ (27,024)