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Share-Based Compensation - Restricted Share Unit (Details) | 9 Months Ended |
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Sep. 30, 2022 USD ($) $ / shares shares | Sep. 30, 2022 USD ($) £ / shares $ / shares shares | Sep. 30, 2021 USD ($) $ / shares | Dec. 31, 2021 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Unvested (in shares) | shares | 2,929,746 | 2,929,746 |  |
Unvested (in dollars per share) | $ / shares | $ 16.68 | $ 16.68 |  |
Granted (in shares) | shares | 2,000,783 | 2,000,783 |  |
Granted (in dollars per share) | $ / shares | $ 10.29 |  | $ 22.71 |
Restricted Stock Units (RSUs) |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Unvested (in shares) | shares | 226,395 | 226,395 |  | 115,140
Unvested (in dollars per share) | $ / shares | $ 11.59 | $ 11.59 |  | $ 10.19
Granted (in shares) | shares | 143,830 | 143,830 |  |
Granted (in dollars per share) | $ / shares | $ 14.89 |  |  |
Vested (shares) | shares | (31,975) | (31,975) |  |
Vested (in dollars per share) | $ / shares | $ 9.94 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Number of Shares | shares | (600) | (600) |  |
Forfeited (in dollars per share) | $ / shares | $ 14.68 |  |  |
Unrecognized compensation cost | $ | $ 2,200,000 | $ 2,200,000 | $ 1,600,000 |
Period for recognition (in years) | 3 years | 3 years | 2 years 11 months 12 days |
Exercise price (in pound sterling per share) | £ / shares |  | $ 0.01 |  |

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- Definition Amount of cost not yet recognized for nonvested award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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