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Stock-based Compensation - Summary Of Stock Options Activity Under The Plan (Details) - $ / shares | 1 Months Ended | 12 Months Ended
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Jan. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Share-based Payment Arrangement [Abstract] |  |  |  |
Number of Options, Beginning Balance | 28,889,524 | 18,395,130 | 8,370,552 |
Number of Options, Granted |  | 13,158,430 | 12,199,200 |
Number of Options, Exercised | (185,000) | (871,668) | (1,011,873) |
Number of Options, Forfeited |  | (425,001) | (1,158,528) |
Number of Options, Expired |  | (1,367,367) | (4,221) |
Number of Options, Ending Balance |  | 28,889,524 | 18,395,130 | 8,370,552
Number of Options, Vested and exercisable |  | 17,099,956 |  |
Number of Options, Vested and expected to vest |  | 25,023,502 |  |
Weighted Average Exercise Price Per Share, Beginning Balance | $ 5.92 | $ 3.78 | $ 2.66 |
Weighted Average Exercise Price Per Share, Granted |  | 8.41 | 4.36 |
Weighted Average Exercise Price Per Share, Exercised |  | 2.65 | 2.61 |
Weighted Average Exercise Price Per Share, Forfeited |  | 1.68 | 2.82 |
Weighted Average Exercise Price Per Share, Expired |  | 4.64 | 2.81 |
Weighted Average Exercise Price Per Share, Ending Balance |  | 5.92 | $ 3.78 | $ 2.66
Weighted Average Exercise Price Per Share, Vested and exercisable |  | 5.26 |  |
Weighted Average Exercise Price Per Share, Vested and expected to vest |  | $ 6.22 |  |
Weighted Average Remaining Contractual Term (Years) |  | 8 years 9 months 18 days | 9 years 2 months 12 days | 9 years 2 months 12 days
Weighted Average Remaining Contractual Term (Years) , Vested and exercisable |  | 8 years 7 months 6 days |  |
Weighted Average Remaining Contractual Term (Years) , Vested and expected to vest |  | 8 years 10 months 24 days |  |

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- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. + References 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)(iv)(4) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + References 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)(iv)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: 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)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Number of fully vested and expected to vest exercisable options that may be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References 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 (e)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. + References No definition available. + Details
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- Definition 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. + References 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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