Income Tax Expense - Components (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Loss before income taxes attributable to domestic and international operations
Domestic	$ (40,540)	$ (71,344)	$ (78,761)
Foreign	(8,420)	1,999	(3,902)
Loss before income taxes	(48,960)	(69,345)	(82,663)
Current tax
Foreign	(490)	(139)	(101)
Total income tax expense	$ (490)	$ (139)	$ (101)
Effective income tax reconciliation
Statutory income tax rate	12.50%	12.50%	12.50%
Non-deductible expenses			(0.10%)
Income not subject to tax	0.40%	0.20%	0.30%
Tax credits		0.60%	0.40%
Foreign operations	(7.30%)	3.00%	0.60%
Tax audit assessments			(11.80%)
Other	(1.70%)	2.30%	0.80%
Valuation allowance	(4.90%)	(18.80%)	(2.80%)
Effective income tax rate	(1.00%)	(0.20%)	(0.10%)
Ireland
Effective income tax reconciliation
Statutory income tax rate	12.50%	12.50%	12.50%