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		Mar. 31, 2025	Dec. 31, 2024
Assets:
Cash and cash equivalents		$ 162,360	$ 56,840
Total assets		699,826	366,281
Liabilities:
Public warrants		21,241	70,688
Short-term Investments [Member]
Assets:
Investments		428,605	285,896
Other Long-term Investments [Member]
Assets:
Investments		108,861	23,545
Cash and money market funds [Member]
Assets:
Cash and cash equivalents	[1]	24,871	33,204
Corporate Notes And Bonds [Member] | Short-term Investments [Member]
Assets:
Investments		13,932	43,868
Corporate Notes And Bonds [Member] | Other Long-term Investments [Member]
Assets:
Investments			1,924
US Government Corporations and Agencies Securities [Member]
Assets:
Cash and cash equivalents		137,489	23,636
US Government Corporations and Agencies Securities [Member] | Short-term Investments [Member]
Assets:
Investments		414,673	242,028
US Government Corporations and Agencies Securities [Member] | Other Long-term Investments [Member]
Assets:
Investments		108,861	21,621
Quoted Prices in Active Markets (Level 1) [Member]
Assets:
Cash and cash equivalents		24,871	33,204
Total assets		24,871	33,204
Liabilities:
Public warrants		21,241	70,688
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]	24,871	33,204
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
Quoted Prices in Active Markets (Level 1) [Member] | US Government Corporations and Agencies Securities [Member]
Assets:
Cash and cash equivalents		0	0
Quoted Prices in Active Markets (Level 1) [Member] | US Government Corporations and Agencies Securities [Member] | Short-term Investments [Member]
Assets:
Investments		0	0
Quoted Prices in Active Markets (Level 1) [Member] | US Government Corporations and Agencies Securities [Member] | Other Long-term Investments [Member]
Assets:
Investments		0	0
Significant Other Observable Inputs (Level 2) [Member]
Assets:
Cash and cash equivalents		137,489	23,636
Total assets		674,955	333,077
Liabilities:
Public warrants		0	0
Significant Other Observable Inputs (Level 2) [Member] | Short-term Investments [Member]
Assets:
Investments		428,605	285,896
Significant Other Observable Inputs (Level 2) [Member] | Other Long-term Investments [Member]
Assets:
Investments		108,861	23,545
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] | Corporate Notes And Bonds [Member] | Short-term Investments [Member]
Assets:
Investments		13,932	43,868
Significant Other Observable Inputs (Level 2) [Member] | Corporate Notes And Bonds [Member] | Other Long-term Investments [Member]
Assets:
Investments			1,924
Significant Other Observable Inputs (Level 2) [Member] | US Government Corporations and Agencies Securities [Member]
Assets:
Cash and cash equivalents		137,489	23,636
Significant Other Observable Inputs (Level 2) [Member] | US Government Corporations and Agencies Securities [Member] | Short-term Investments [Member]
Assets:
Investments		414,673	242,028
Significant Other Observable Inputs (Level 2) [Member] | US Government Corporations and Agencies Securities [Member] | Other Long-term Investments [Member]
Assets:
Investments		108,861	21,621
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] | 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
Unobservable Inputs (Level 3) [Member] | US Government Corporations and Agencies Securities [Member]
Assets:
Cash and cash equivalents		0	0
Unobservable Inputs (Level 3) [Member] | US Government Corporations and Agencies Securities [Member] | Short-term Investments [Member]
Assets:
Investments		0	0
Unobservable Inputs (Level 3) [Member] | US Government Corporations and Agencies Securities [Member] | Other Long-term Investments [Member]
Assets:
Investments		$ 0	$ 0

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