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Share-Based Compensation - Schedule of Outstanding Stock Options (Details) - $ / shares | 6 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |  |
Number of shares, Outstanding at beginning of period | 4,132,123 | 3,505,119
Number of shares, Granted | 1,384,616 | 869,075
Number of shares, Exercised | (203,283) | (266,687)
Number of shares, Cancelled or forfeited | (55,451) | (7,962)
Number of shares, Outstanding at end of period | 5,258,005 | 4,099,545
Weighted average exercise price, Outstanding at beginning of period | $ 6.39 | $ 2.07
Weighted average exercise price, Granted | 35.79 | 16.35
Weighted average exercise price, Exercised | 3.11 | 1.83
Weighted average exercise price, Cancelled or forfeited | 25.08 | 2.13
Weighted average exercise price, Outstanding at end of period | $ 14.06 | $ 5.11

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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 Weighted average price at which grantees can acquire the shares reserved for issuance under 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)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. + References No definition available. + Details
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- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. + References No definition available. + Details
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