Revenue - Schedule of Product Revenue Based on Product Line and Location (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation Of Revenue [Line Items]
Product revenue	$ 65,155	$ 19,590	$ 152,963	$ 45,073
United States
Disaggregation Of Revenue [Line Items]
Product revenue	52,771	11,144	116,729	24,450
Europe
Disaggregation Of Revenue [Line Items]
Product revenue	8,624	6,370	27,266	15,962
All Other Countries
Disaggregation Of Revenue [Line Items]
Product revenue	3,760	2,076	8,968	4,661
Coronary
Disaggregation Of Revenue [Line Items]
Product revenue	47,165	6,983	99,175	16,403
Peripheral
Disaggregation Of Revenue [Line Items]
Product revenue	17,725	12,337	52,659	27,927
Other
Disaggregation Of Revenue [Line Items]
Product revenue	$ 265	$ 270	$ 1,129	$ 743