Stock-Based Compensation - Additional Information (Detail) $ / shares in Units, $ in Millions	1 Months Ended				3 Months Ended
	Mar. 31, 2024 USD ($) $ / shares shares	Mar. 31, 2023 $ / shares shares	Mar. 31, 2022 Tranche $ / shares shares	May 31, 2016	Mar. 31, 2024 USD ($) $ / shares shares	Mar. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2023 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares issued	96,333,373				96,333,373		92,997,158
Weighted Average Grant Date Fair Value per Share, Granted | $ / shares					$ 34.52
Number of Shares, Granted					2,939,011
Unvested restricted stock units	5,694,630				5,694,630		4,041,753
Risk-free interest rate					4.20%	4.40%
Expected dividend yield					0.00%	0.00%
Expected volatility					76.40%	78.70%
Expected term					6 years	6 years
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining vesting period					1 year 4 months 28 days
Weighted average grant date fair value per share | $ / shares					$ 22.61	$ 28.82
Total intrinsic value of stock options exercised | $					$ 1.2	$ 1.1
Unrecognized compensation cost related to stock options | $	$ 55.9				$ 55.9
2015 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Description of stock options granted under the Plan					Stock options generally vest as to one-third on the first anniversary of the original vesting date, with the balance vesting monthly over the remaining two years, unless they contain specific vesting provisions. The maximum term of stock options granted under the 2015 Plan is ten years.
Shares available for future issuance	4,365,763				4,365,763
Percentage of cumulative increase in number of shares for future issuance					4.00%
2016 Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Description of stock options granted under the Plan				The 2016 Plan allows eligible employees to purchase shares of the Company’s common stock on the last day of each predetermined six-month offering period at 85% of the lower of the fair market value per share at the beginning or end of the applicable offering period.
Percentage of fair market value of common stock				85.00%
Shares available for future issuance	1,077,487				1,077,487
Common stock, shares issued	0	0			0	0
Risk-free interest rate					5.24%	4.70%
Expected dividend yield					0.00%	0.00%
Expected volatility					56.70%	69.20%
Expected term					6 months	6 months
Service Awards [Member] | RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining vesting period	3 years	3 years
Weighted Average Grant Date Fair Value per Share, Granted | $ / shares	$ 32.66	$ 40.75
Number of Shares, Granted	2,157,921	2,195,135
Unvested restricted stock units	4,733,350				4,733,350
Market Awards [Member] | RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock units	472,745				472,745
Market Awards [Member] | RSUs [Member] | Senior Executives [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining vesting period	3 years	3 years	3 years
Weighted Average Grant Date Fair Value per Share, Granted | $ / shares	$ 51.12	$ 68.55	$ 126.49
Number of Shares, Granted	235,858	181,743	55,144
Risk-free interest rate	4.28%	4.60%	1.44%
Expected dividend yield	0.00%	0.00%	0.00%
Expected volatility	77.20%	84.34%	82.53%
Expected term	3 years	3 years	3 years
Performance Based Awards with TSR Multiplier [Member] | RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested restricted stock units	444,117				444,117
Performance Based Awards with TSR Multiplier [Member] | RSUs [Member] | Senior Executives [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant Date Fair Value per Share, Granted | $ / shares	$ 36.16
Number of Shares, Granted	444,117
Risk-free interest rate	4.28%
Expected dividend yield	0.00%
Expected volatility	77.20%
Expected term	3 years
Performance Based Awards [Member] | RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant Date Fair Value per Share, Granted | $ / shares					$ 34.52	$ 42.78
Total fair value amount, Vested | $					$ 30.9	$ 12.1
Unvested restricted stock units	44,418				44,418
Unrecognized equity-based compensation expense related to restricted stock | $	$ 191.3				$ 191.3
Weighted average period of unrecognized compensation costs					2 years
Performance Based Awards [Member] | RSUs [Member] | Non-executive Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Granted			66,296
Number of tranches | Tranche			2
Performance Based Awards [Member] | First Anniversary of Original Vesting Date [Member] | RSUs [Member] | Non-executive Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Granted			21,878
Maximum | 2016 Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares issued	500,000				500,000
Maximum | Performance Based Awards with TSR Multiplier [Member] | RSUs [Member] | Senior Executives [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangements by Share Based Payment Award, Performance Shares	200.00%
TSR modifier	125.00%
Minimum | Performance Based Awards with TSR Multiplier [Member] | RSUs [Member] | Senior Executives [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangements by Share Based Payment Award, Performance Shares	0.00%
TSR modifier	75.00%