Revenue - Schedule of Revenue Disaggregated by Type of Products and Services (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation Of Revenue [Line Items]
Total revenue	$ 154,344	$ 98,382	$ 85,071
Sequencing Revenue
Disaggregation Of Revenue [Line Items]
Total revenue	78,896	41,439	43,519
Development Support Revenue
Disaggregation Of Revenue [Line Items]
Total revenue	65,448	54,443	39,552
Development Revenue Regulatory Milestones
Disaggregation Of Revenue [Line Items]
Total revenue	10,000	2,500	2,000
Development Revenue
Disaggregation Of Revenue [Line Items]
Total revenue	$ 75,448	$ 56,943	$ 41,552