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Stockholder's Equity - Additional Information (Details) - $ / shares | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2021 | Jan. 01, 2021 | Sep. 30, 2020 | Oct. 02, 2019 | Oct. 01, 2019
Class Of Stock [Line Items] |  |  |  |  |
Capital stock, shares authorized |  |  |  |  | 600,000,000
Preferred stock, shares authorized |  |  |  |  | 40,000,000
Preferred stock, par value per share |  |  |  |  | $ 0.01
Common stock, shares authorized | 560,000,000 |  | 560,000,000 |  | 560,000,000
Common stock, par value per share | $ 0.01 |  | $ 0.01 |  | $ 0.01
Common stock reserved for issuance |  | 1,130,547 |  | 6,350,000 |
2019 Equity Incentive Plan |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Common stock reserved for issuance |  |  |  | 5,300,000 |
Share-based compensation arrangement by share-based payment award, terms of award | Awards issued under the Plan may not have a term greater than ten years from the date of grant. |  |  |  |
2019 Equity Incentive Plan | Maximum |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Share-based compensation arrangement by share-based payment award, expected term | 10 years |  |  |  |
2019 Employee Stock Purchase Plan |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Common stock reserved for issuance |  |  |  | 1,050,000 |

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