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Stockholders' Equity - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Preferred stock authorized	100,000,000	100,000,000		100,000,000
Preferred stock per share	$ 0.01	$ 0.01		$ 0.01
Dividends Declared	$ 0
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock authorized	1,300,000,000
Common stock reserve for issuance	4,622,750	3,725,304
Exercise of common stock options		$ 569,000	$ 5,666,000
Common Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise of common stock options			$ 1,000
Exercise of common stock options, Shares		14,329	134,515
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair value of stock granted	$ 37,010,000	$ 39,419,000	$ 63,987,000
Aggregate intrinsic value of restricted stock units vested	$ 13,744,000	18,773,000	22,218,000
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Cancelled shares	422,319
Shares issued	595,462
Shares, granted	1,903,463
Performance-based Market Condition Share Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair value of stock granted		5,805,000	63,157,000
Shares, granted	0
2020 Equity Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option vesting period	4 years
Stock option expiration period	10 years
Shares available for grant	771,730
Aggregate intrinsic value of stock options exercised	$ 0	$ 206,000	$ 5,167,000
Stock options, granted	0	0	0
Exercise of common stock options		$ 569,000	$ 5,740,000
Exercise of common stock options, Shares	0
2020 Employee Stock Purchase Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, discount from market price, purchase date	85.00%
Shares, issued under ESPP	115,527	61,216	35,168
Shares available for issuance	329,741
Equity Award Plan [Member] | Common Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock-based compensation	$ 29,672,000
Weighted-average period	1 year 10 months 24 days
Conversa [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Aggregate merger consideration, shares			1,000,000
Common stock fair value per share			$ 4.21
Silver Cloud Health Holdings, Inc. [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Aggregate merger consideration, shares			5,000,000
Common stock fair value per share			$ 2.61
Common Class A [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock per share	$ 0.01	$ 0.01		$ 0.01
Common stock authorized	1,000,000,000	1,000,000,000		1,000,000,000
Common stock, voting rights	one
Common stock per share	$ 139
Common Class A [Member] | SilverCloud Bonus Escrow [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares related to early settlement of bonus escrow			600,000
Common Class C [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock per share	$ 0.01	$ 0.01		$ 0.01
Common stock authorized	200,000,000	200,000,000		200,000,000
Common stock, voting rights	one
Common stock per share	$ 3
Common Class B [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock per share	$ 0.01	$ 0.01		$ 0.01
Common stock authorized	100,000,000	100,000,000		100,000,000
Common stock, voting rights	(x) 1.0408163 and (y) the total number of votes that would be cast at such time by the holders of the Class A and Class C common stock and any other preferred stock entitled to vote under the certificate of incorporation at such time (resulting in the Class B common stock collectively holding 51% of the total outstanding voting power)
Number of shares converted	0
Common stock per share	$ 14

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