Fair Value Measurements - Summary of fair value measurements on a recurring basis and the level of inputs (Detail) - Fair Value, Recurring [Member] - USD ($) $ in Thousands		Sep. 30, 2023	Dec. 31, 2022
Assets:
Cash and cash equivalents		$ 39,553	$ 46,367
Total Assets		487,521	539,798
Liabilities:
Public warrants		30,599	3,819
Short-term Investments [Member]
Assets:
Investments		346,853	311,430
Other Long-term Investments [Member]
Assets:
Investments		101,115	182,001
Cash and money market funds [Member]
Assets:
Cash and cash equivalents	[1]	8,030	46,367
Commercial Paper [Member] | Short-term Investments [Member]
Assets:
Investments		39,980	129,698
Municipal Bonds [Member] | Short-term Investments [Member]
Assets:
Investments		4,873	4,911
Municipal Bonds [Member] | Other Long-term Investments [Member]
Assets:
Investments			4,721
Corporate Notes And Bonds [Member] | Short-term Investments [Member]
Assets:
Investments		133,242	120,447
Corporate Notes And Bonds [Member] | Other Long-term Investments [Member]
Assets:
Investments		65,113	150,763
US government and agency
Assets:
Cash and cash equivalents		31,523
US government and agency | Short-term Investments [Member]
Assets:
Investments		168,758	56,374
US government and agency | Other Long-term Investments [Member]
Assets:
Investments		36,002	26,517
Quoted Prices in Active Markets (Level 1) [Member]
Assets:
Cash and cash equivalents		8,030	46,367
Total Assets		8,030	46,367
Liabilities:
Public warrants		30,599	3,819
Quoted Prices in Active Markets (Level 1) [Member] | Short-term Investments [Member]
Assets:
Investments		0	0
Quoted Prices in Active Markets (Level 1) [Member] | Other Long-term Investments [Member]
Assets:
Investments		0	0
Quoted Prices in Active Markets (Level 1) [Member] | Cash and money market funds [Member]
Assets:
Cash and cash equivalents	[1]	8,030	46,367
Quoted Prices in Active Markets (Level 1) [Member] | Commercial Paper [Member] | Short-term Investments [Member]
Assets:
Investments		0	0
Quoted Prices in Active Markets (Level 1) [Member] | Municipal Bonds [Member] | Short-term Investments [Member]
Assets:
Investments		0	0
Quoted Prices in Active Markets (Level 1) [Member] | Municipal Bonds [Member] | Other Long-term Investments [Member]
Assets:
Investments			0
Quoted Prices in Active Markets (Level 1) [Member] | Corporate Notes And Bonds [Member] | Short-term Investments [Member]
Assets:
Investments		0	0
Quoted Prices in Active Markets (Level 1) [Member] | Corporate Notes And Bonds [Member] | Other Long-term Investments [Member]
Assets:
Investments		0	0
Quoted Prices in Active Markets (Level 1) [Member] | US government and agency
Assets:
Cash and cash equivalents		0
Quoted Prices in Active Markets (Level 1) [Member] | US government and agency | Short-term Investments [Member]
Assets:
Investments		0	0
Quoted Prices in Active Markets (Level 1) [Member] | US government and agency | Other Long-term Investments [Member]
Assets:
Investments			0
Significant Other Observable Inputs (Level 2) [Member]
Assets:
Cash and cash equivalents		31,523	0
Total Assets		479,491	493,431
Liabilities:
Public warrants		0	0
Significant Other Observable Inputs (Level 2) [Member] | Short-term Investments [Member]
Assets:
Investments		346,853	311,430
Significant Other Observable Inputs (Level 2) [Member] | Other Long-term Investments [Member]
Assets:
Investments		101,115	182,001
Significant Other Observable Inputs (Level 2) [Member] | Cash and money market funds [Member]
Assets:
Cash and cash equivalents	[1]	0	0
Significant Other Observable Inputs (Level 2) [Member] | Commercial Paper [Member] | Short-term Investments [Member]
Assets:
Investments		39,980	129,698
Significant Other Observable Inputs (Level 2) [Member] | Municipal Bonds [Member] | Short-term Investments [Member]
Assets:
Investments		4,873	4,911
Significant Other Observable Inputs (Level 2) [Member] | Municipal Bonds [Member] | Other Long-term Investments [Member]
Assets:
Investments			4,721
Significant Other Observable Inputs (Level 2) [Member] | Corporate Notes And Bonds [Member] | Short-term Investments [Member]
Assets:
Investments		133,242	120,447
Significant Other Observable Inputs (Level 2) [Member] | Corporate Notes And Bonds [Member] | Other Long-term Investments [Member]
Assets:
Investments		65,113	150,763
Significant Other Observable Inputs (Level 2) [Member] | US government and agency
Assets:
Cash and cash equivalents		31,523
Significant Other Observable Inputs (Level 2) [Member] | US government and agency | Short-term Investments [Member]
Assets:
Investments		168,758	56,374
Significant Other Observable Inputs (Level 2) [Member] | US government and agency | Other Long-term Investments [Member]
Assets:
Investments		36,002	26,517
Unobservable Inputs (Level 3) [Member]
Assets:
Cash and cash equivalents		0	0
Total Assets		0	0
Liabilities:
Public warrants		0	0
Unobservable Inputs (Level 3) [Member] | Short-term Investments [Member]
Assets:
Investments		0	0
Unobservable Inputs (Level 3) [Member] | Other Long-term Investments [Member]
Assets:
Investments		0	0
Unobservable Inputs (Level 3) [Member] | Cash and money market funds [Member]
Assets:
Cash and cash equivalents	[1]	0	0
Unobservable Inputs (Level 3) [Member] | Commercial Paper [Member] | Short-term Investments [Member]
Assets:
Investments		0	0
Unobservable Inputs (Level 3) [Member] | Municipal Bonds [Member] | Short-term Investments [Member]
Assets:
Investments		0	0
Unobservable Inputs (Level 3) [Member] | Municipal Bonds [Member] | Other Long-term Investments [Member]
Assets:
Investments			0
Unobservable Inputs (Level 3) [Member] | Corporate Notes And Bonds [Member] | Short-term Investments [Member]
Assets:
Investments		0	0
Unobservable Inputs (Level 3) [Member] | Corporate Notes And Bonds [Member] | Other Long-term Investments [Member]
Assets:
Investments		0	0
Unobservable Inputs (Level 3) [Member] | US government and agency
Assets:
Cash and cash equivalents		0
Unobservable Inputs (Level 3) [Member] | US government and agency | Short-term Investments [Member]
Assets:
Investments		$ 0	0
Unobservable Inputs (Level 3) [Member] | US government and agency | Other Long-term Investments [Member]
Assets:
Investments			$ 0

[1] Includes money market funds associated with the Company’s overnight investment sweep account and cash collateralizing the Company's letter of credit and corporate credit cards.