Entity Wide Disclosures - Summary of Revenue by Major Source (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation Of Revenue [Line Items]
Total revenue	$ 278,293	$ 204,995	$ 538,258	$ 435,874
Oncology
Disaggregation Of Revenue [Line Items]
Total revenue	93,248	65,629	172,386	134,841
Other
Disaggregation Of Revenue [Line Items]
Total revenue	64,120	45,196	133,058	95,765
Metabolic
Disaggregation Of Revenue [Line Items]
Total revenue	38,143	30,210	70,638	66,285
AVAI
Disaggregation Of Revenue [Line Items]
Total revenue	26,191	22,987	57,011	48,134
Central Nervous System
Disaggregation Of Revenue [Line Items]
Total revenue	28,551	19,218	53,363	43,195
Cardiology
Disaggregation Of Revenue [Line Items]
Total revenue	28,040	21,755	51,802	47,654
Revenue Net
Disaggregation Of Revenue [Line Items]
Total revenue	$ 278,293	$ 204,995	$ 538,258	$ 435,874