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Share-Based Compensation - Additional Information (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Jun. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Mar. 24, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Shares granted |  |  |  |  | 506,500 |  |
Share-based compensation tax benefits |  | $ 200,000 | $ 100,000 |  | $ 500,000 | $ 500,000 |
Share-based compensation |  |  |  |  | 2,705,000 | $ 16,906,000 |
Pretax unrecognized compensation expense |  |  |  |  | $ 13,400,000 |  |
Forfeiture rate utilized for estimating forfeitures of options and restricted share units granted. |  |  |  |  | 5.00% |  |
Share options contractual term |  |  |  |  | 10 years |  |
Aggregate intrinsic value of options exercisable |  | 3,416,065 |  |  | $ 3,416,065 |  |
Share options exercised, shares |  |  |  |  | 13,594 |  |
Unrecognized pre-tax share based compensation expense related to unvested share option awards |  | 11,200,000 |  |  | $ 11,200,000 |  |
Shares vested |  |  |  |  | 18,055 |  |
Unrecognized pre-tax compensation expense related to unvested share awards |  | $ 2,200,000 |  |  | $ 2,200,000 |  |
Employee Share Purchase Plan |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Number of shares authorized |  |  |  |  |  |  | 256,730
Number of outstanding shares added annually | 275,000 |  |  |  |  |  |
Percentage of outstanding shares | 1.00% |  |  |  |  |  |
Total number of shares available under ESPP | 550,000 |  |  |  |  |  |
Percentage of purchase price shares on first trading day of each offering period or on the purchase date | 85.00% |  |  |  |  |  |
Recapitalization Awards |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Share-based compensation |  |  |  | $ 15,400,000 |  |  |
2019 Share Incentive Plan |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Number of shares authorized |  | 1,283,649 |  |  | 1,283,649 |  | 1,283,649
Shares granted |  |  |  |  | 506,500 |  |
Percentage of outstanding shares | 5.00% |  |  |  |  |  |
2019 Share Incentive Plan | Maximum |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Number of outstanding shares added annually | 1,320,000 |  |  |  |  |  |
2019 Share Incentive Plan | IPO |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Number of shares authorized | 3,400,000 |  |  | 3,400,000 |  |  |
2019 Share Incentive Plan | RSAs and RSUs | IPO |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Shares granted | 240,037 |  |  |  |  |  |
2019 Share Incentive Plan | Recapitalization Awards | IPO |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Share price | $ 12.00 |  |  | $ 12.00 |  |  |
2019 Share Incentive Plan | Restricted Stock Units (RSUs) |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Shares granted |  |  |  |  | 506,500 |  |
Shares vested |  |  |  |  | 18,055 |  |
Shares to pay emloyees' portion of minimum payroll withholding taxes |  |  |  |  | 3,889 |  |

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- Definition Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit 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 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Amount of cost to be recognized for option under share-based payment arrangement. + 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 (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Amount of tax benefit for recognition of expense of award under share-based payment arrangement. + 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 (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target 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)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + 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)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The highest quantity of shares an employee can purchase under the plan per period. + 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 + Details
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- Definition The increase or decrease in number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding, including 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 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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