Stock-Based Compensation Plan - Summary of Stock Options Vested and Expected to Vest (Details) - $ / shares	3 Months Ended
Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
2011 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Options outstanding, number of stock options (in shares)	1,209,364	1,260,328	1,515,146	1,571,205
Options exercisable, number of stock options (in shares)	1,209,364
Options outstanding, weighted average remaining contractual life (in years)	5 months 1 day
Options exercisable, weighted average remaining contractual life (in years)	5 months 1 day
Options outstanding exercise price (in usd per share)	$ 0.57	$ 0.56	$ 0.58	$ 0.59
Options exercisable, weighted average exercise price (in usd per share)	$ 0.57
2017 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Options outstanding, number of stock options (in shares)	3,910,694	3,936,176	3,961,658	3,961,658
Options exercisable, number of stock options (in shares)	3,631,681
Options outstanding, weighted average remaining contractual life (in years)	7 years 3 months 18 days
Options exercisable, weighted average remaining contractual life (in years)	7 years 2 months 15 days
Options outstanding exercise price (in usd per share)	$ 0.92	$ 0.92	$ 0.92	$ 0.92
Options exercisable, weighted average exercise price (in usd per share)	$ 0.92
2020 Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
Options outstanding, number of stock options (in shares)	2,968,032	1,469,297	1,409,401	0
Options exercisable, number of stock options (in shares)	388,691
Options outstanding, weighted average remaining contractual life (in years)	9 years 2 months 12 days
Options exercisable, weighted average remaining contractual life (in years)	7 years 3 months 7 days
Options outstanding exercise price (in usd per share)	$ 6.13	$ 11.12	$ 11.35	$ 0
Options exercisable, weighted average exercise price (in usd per share)	$ 11.34

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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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 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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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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