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Stock-Based Compensation - Summary of Granted and Outstanding Shares (Details) - shares | Sep. 30, 2022 | Sep. 30, 2021
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Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Options (in shares) | 2,721,384 | 3,456,239
Total (in shares) | 6,790,815 |
2004 Plan |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Options (in shares) | 175,083 |
Total (in shares) | 175,083 |
2013 Plan |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Options (in shares) | 2,543,301 |
Total (in shares) | 5,689,187 |
2021 Plan |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Options (in shares) | 3,000 |
Total (in shares) | 926,545 |
Restricted Stock Units (RSUs) |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Share-based payment award (in shares) | 4,069,431 | 3,831,850
Restricted Stock Units (RSUs) | 2004 Plan |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Share-based payment award (in shares) | 0 |
Restricted Stock Units (RSUs) | 2013 Plan |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Share-based payment award (in shares) | 3,145,886 |
Restricted Stock Units (RSUs) | 2021 Plan |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Share-based payment award (in shares) | 923,545 |

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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + 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)(2)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + 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)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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