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Stockholders' equity (Tables)
 9 Months Ended
Sep. 30, 2022
Share-Based Payment Arrangement [Abstract]  
Schedule of Common Stock Reserved for Future Issuance The Company had the following common stock reserved for future issuance as of September 30, 2022, and December 31, 2021, respectively:
September 30,December 31,
20222021
Stock options to purchase common stock (1)
10,728,915 20,342,259 
Shares available for future issuance under:
2021 Equity Incentive Plan5,287,548 11,417,359 
2021 Employee Stock Purchase Plan2,273,246 2,800,000 
Total shares of common stock reserved18,289,709 34,559,618 
(1) Excludes 82,791 and 106,155 cash-settled SARs outstanding as of September 30, 2022, and December 31, 2021, respectively.
Schedule 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 volatility68.6%
Expected life (in years)4.9
Expected dividend yield—%
Summary of Option Activity
The following is a summary of activity for stock options under the Equity Incentive Plans:

Options OutstandingWeighted Average Exercise PriceWeighted Average Remaining Contractual TermAggregate Intrinsic Value
(In Thousands)
Balance - December 31, 2021
19,942,259 $9.70 8.14$226,350 
Granted — — 
Exercised (1,273,968)4.44 
Canceled in connection with the Equity Exchange(6,762,489)18.62 
Canceled (1,226,887)13.49 
Balance - September 30, 2022
10,678,915 $4.25 6.63$84,557 
Vested & expected to vest as of September 30, 2022
10,678,915 $4.25 6.63$84,557 
Exercisable as of September 30, 2022
8,388,865 $3.95 6.49$68,602 
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, 2021
106,155 $8.45 8.25$1,267 
Granted — — 
Exercised (743)3.63 
Canceled in connection with the Equity Exchange(21,055)19.19 
Canceled(1,566)18.95 
Balance - September 30, 2022
82,791 $5.57 7.06$546 
Vested & expected to vest as of September 30, 2022
82,791 $5.57 7.06$546 
Exercisable as of September 30, 2022
61,845 $5.36 6.98$423 
Schedule of Restricted Stock Unit Activity
A summary of RSU activity under the 2021 Plan is as follows:
RSUs OutstandingWeighted Average Grant Date Fair Value
Unvested - December 31, 2021
2,545,051$27.64 
Granted 8,183,583$13.40 
Awarded in connection with the Equity Exchange (1)
7,133,544 $19.06 
Released(294,779)$18.29 
Canceled(847,920)$19.15 
Unvested - September 30, 2022
16,719,479$17.60 
(1) Inclusive of 175,000 Performance-Based Awards that were separately modified, as discussed below.
Summary of Performance-Based Options
The following table summarizes the activities of Performance-Based Awards under the Equity Incentive Plans:

Performance-Based Awards OutstandingWeighted Average Exercise PriceWeighted Average Remaining Contractual TermAggregate Intrinsic Value
(In Thousands)
Balance - December 31, 2021
400,000 $10.12 8.60$3,768 
Granted — 
Exercised — 
Canceled (1)
(350,000)11.13 
Balance - September 30, 2022
50,000 $3.06 5.83$452 
Vested & expected to vest as of September 30, 2022
50,000 $3.06 5.83$452 
Exercisable as of September 30, 2022
10,416 $3.06 5.83$94 
(1) 175,000 shares were canceled as part of the Equity Exchange, and 175,000 shares were canceled as part of the modification discussed above.
Schedule of Stock-Based Compensation Expense
Total stock-based compensation expense included in the condensed consolidated statements of operations was as follows (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2022202120222021
Cost of revenue$1,611 $350 $3,440 $888 
Sales and marketing9,372 2,149 18,516 5,784 
Research and development6,258 1,304 13,303 4,445 
General and administrative7,728 3,417 17,784 12,587 
Total stock-based compensation expense$24,969 $7,220 $53,043 $23,704