Segment Reporting (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Product revenues	$ 266,005	$ 136,061	$ 554,540	$ 364,674
Type of Revenue [Extensible List]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
United States
Segment Reporting Information [Line Items]
Product revenues	$ 102,174	$ 47,097	$ 217,461	$ 153,015
Germany
Segment Reporting Information [Line Items]
Product revenues	16,350	9,761	35,530	26,591
South Korea
Segment Reporting Information [Line Items]
Product revenues	25,516	20,385	50,156	36,802
Japan
Segment Reporting Information [Line Items]
Product revenues	17,633	9,349	35,553	25,486
China
Segment Reporting Information [Line Items]
Product revenues	33,857	23,517	67,372	36,520
Other
Segment Reporting Information [Line Items]
Product revenues	70,475	25,952	148,468	86,260
Non U.S.
Segment Reporting Information [Line Items]
Product revenues	$ 163,831	$ 88,964	$ 337,079	$ 211,659