Stockholders’ Equity and Stock Option Plans - Summary of Stock Option Activity and Related Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2022	Dec. 31, 2021
Number of Shares Underlying Outstanding Options
Beginning balance (in shares)	6,542,351
Options granted (in shares)	417,016
Options exercised (in shares)	(130,958)
Options canceled (in shares)	(4,169)
Ending balance (in shares)	6,824,240	6,542,351
Vested (in shares)	4,513,131
Weighted-Average Exercise Price
Beginning balance (in usd per share)	$ 6.08
Options granted (in usd per share)	26.64
Options exercised (in usd per share)	3.68
Options canceled (in usd per share)	5.74
Ending balance (in usd per share)	7.39	$ 6.08
Vested (in usd per share)	$ 3.94
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted average remaining contractual term (years)	6 years 10 months 28 days	6 years 11 months 12 days
Weighted average remaining contractual term vested (in years)	6 years 21 days
Aggregate intrinsic value, awards outstanding	$ 135,005	$ 184,727
Aggregate intrinsic value, vested	$ 102,130

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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