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Stockholders' equity (Tables)
 12 Months Ended
Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]  
Summary of Common Stock Reserved for Future Issuance Shares of common stock reserved for future issuance consisted of the following:
December 31,December 31,
20232022
2010 Equity Incentive Plan:
Stock options outstanding4,621,021 10,333,771 
2021 Equity Incentive Plan:
RSUs outstanding and PSUs(1)
16,738,309 16,178,101 
Shares available for future issuance under:
2021 Equity Incentive Plan4,093,695 2,814,126 
2021 Employee Stock Purchase Plan2,350,803 1,929,578 
Total shares of common stock reserved27,803,828 31,255,576 
(1) The number of PSUs reserved for issuance is based on the maximum achievement of the corporate performance metric.
Summary of Option Activity
The following is a summary of activity for stock options having only service-based vesting conditions under the Equity Incentive Plans:
Options OutstandingWeighted Average Exercise PriceWeighted Average Remaining Contractual TermAggregate Intrinsic Value
(In Thousands)
Balance - December 31, 2022
10,283,771 $4.18 6.38$66,234 
Granted — — 
Exercised (5,477,153)3.29 
Canceled (235,597)7.58 
Balance - December 31, 2023
4,571,021 $5.08 3.23$44,309 
Vested & expected to vest as of December 31, 2023
4,571,021 $5.08 3.23$44,309 
Exercisable as of December 31, 2023
4,405,278 $4.96 3.23$43,157 
Summary of Weighted Average Assumptions, Options The following table summarizes the weighted-average assumptions used in the Black-Scholes option-pricing model to estimate the fair value of the Exchanged Awards as of August 6, 2022:
Risk-free interest rate3.0%
Expected volatility
68.6%
Expected life (in years)
4.9
Expected dividend yield
—%
The calculation of grant date fair value of stock options was based on the following weighted average assumptions:
Fiscal Year Ended December 31,
2021
Risk-free interest rate
1.0 %
Expected volatility
60.5 %
Expected life (in years)
6.0
Expected dividend yield
— %
The Company estimates the fair value of stock-based compensation for SARs by utilizing the Black-Scholes option-pricing model as described above. The calculation of grant date fair value was based on the following weighted average assumptions:
Fiscal Year Ended December 31,
2021
Risk-free interest rate
1.5 %
Expected volatility
60.9 %
Expected life (in years)
6.2
Expected dividend yield
— %
The following table summarizes the weighted-average assumptions used in the Black-Scholes option-pricing model to estimate the grant date fair value of employee stock purchase rights granted under new ESPP offering periods in each year:

Fiscal Year Ended December 31,
202320222021
Risk-free interest rate4.6%3.5%0.3%
Expected volatility68.6%68.5%61.2%
Expected life (in years)1.61.21.2
Expected dividend yield—%—%—%
Summary of Stock Appreciation Rights
The following is a summary of activity for SARs under the Equity Incentive Plans:
SARs OutstandingWeighted Average Exercise PriceWeighted Average Remaining Contractual TermAggregate Intrinsic Value
(In Thousands)
Balance - December 31, 2022
81,770 $5.44 6.90$418 
Granted — — 
Exercised (67,781)5.30 
Canceled(9,289)6.58 
Balance - December 31, 2023
4,700 $5.11 5.98$45 
Vested & expected to vest as of December 31, 2023
4,700 $5.11 5.98$45 
Exercisable as of December 31, 2023
4,558 $5.06 5.97$44 
Summary of Restricted Stock Unit Activity
A summary of RSU and PSU activity under the 2021 Plan is as follows:
RSUs OutstandingWeighted Average Grant Date Fair ValuePSUs OutstandingWeighted Average Grant Date Fair Value
Unvested - December 31, 2022
16,178,101$17.37 — $— 
Granted 8,159,808$9.86 645,833$8.89 
Released(6,134,641)$16.42 — $— 
Canceled(2,433,691)$15.93 — $— 
Unvested - December 31, 2023
15,769,577$14.07 645,833$8.89 
Summary of Performance-Based Options The following table summarizes the activities of Performance-Based Options under the Equity Incentive Plans:
Performance-Based Options Outstanding
Weighted Average Exercise PriceWeighted Average Remaining Contractual TermAggregate Intrinsic Value
(In Thousands)
Balance - December 31, 2022
50,000 $3.06 5.58$375 
Granted— — 
Exercised— — 
Canceled— — 
Balance - December 31, 2023
50,000 $3.06 4.58$584 
Vested & expected to vest as of December 31, 2023
50,000 $3.06 4.58$584 
Exercisable as of December 31, 2023
26,041 $3.06 4.58$304 
Summary of Stock-Based Compensation Expense
Total stock-based compensation expense included in the consolidated statements of operations was as follows (in thousands):
Fiscal Year Ended December 31,
202320222021
Cost of revenue$7,006 $5,360 $1,623 
Sales and marketing30,859 29,054 8,637 
Research and development26,301 20,850 6,816 
General and administrative30,672 26,029 17,604 
Restructuring charges1,208 — — 
Total stock-based compensation expense$96,046 $81,293 $34,680