Nature of Business and Basis of Presentation - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2021 USD ($) Segment	Dec. 31, 2020 USD ($)
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Number of operating segments | Segment	1
Total assets	$ 1,044,991,000	$ 966,021,000
Cash and liquid short-term and long-term investments	523,100,000
Total current assets	995,983,000	879,233,000
Cash and cash equivalents	327,016,000	186,964,000
Short-term investments	181,910,000	313,969,000
Accounts receivable, net	182,259,000	154,574,000
Inventory	272,455,000	188,864,000
Long-term investments	14,158,000	$ 62,469,000
Debt outstanding	$ 0