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Organization and Description of the Business (Details) $ / shares in Units, $ in Thousands |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Feb. 01, 2021 USD ($) $ / shares shares | Nov. 30, 2020 | Mar. 31, 2021 USD ($) | Sep. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Dec. 31, 2020 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |  |  |  |  |  |
Issuance of stock (in shares) | shares | 1,650,000 |  |  |  |  |  |  |
Public offering price (in usd per share) | $ / shares | $ 67.00 |  |  |  |  |  |  |
Proceeds from issuance of common stock upon follow-on public offering, net of issuance costs | $ 103,000 |  |  |  |  | $ 102,959 | $ 0 |
Offering transaction costs | $ 7,600 |  | $ 7,591 | $ 104 | $ 104 |  |  |
Reverse stock split, conversion ratio |  | 0.4673 |  |  |  |  |  |
Cash, cash equivalents, and investments |  |  |  |  |  | 506,600 |  |
Accumulated deficit |  |  |  |  |  | $ 106,791 |  | $ 55,361

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