Income Taxes - Temporary Differences (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets
Accounts receivable	$ 61	$ 29
Accrued compensation	3,552	4,222
Accrued expenses		137
Deferred revenue	696
Net operating loss carryforwards	4,117	5,229
R&D credit carryforward	4,965	7,054
Foreign tax credits	15,054	12,485
Interest rate hedge	253	925
Equity based compensation	3,015
Other assets	380	115
Interest expense	224	869
Right-of-use (ROU) liability	2,944
Total gross deferred tax asset	35,261	31,065
Less: Valuation allowance	(18,235)	(16,715)
Deferred Tax Assets, Net of Valuation Allowance, Total	17,026	14,350
Deferred tax liabilities
Property, equipment, and other long-lived assets	(272)	(359)
Goodwill and intangible assets	(83,844)	(83,935)
Prepaid expenses	(1,968)	(1,724)
Accrued expenses	(184)
Deferred revenue		(1,482)
Right-of-use (ROU) assets	(2,783)
Total gross deferred tax liability	(89,051)	(87,500)
Net deferred tax liability	$ (72,025)	$ (73,150)