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Organization and Basis of Presentation - Additional Information (Details) $ / shares in Units, $ in Thousands |  |  | 12 Months Ended
--- | --- | --- | ---
May 05, 2020 USD ($) $ / shares shares | Mar. 11, 2020 Patient | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($)
Organization And Basis Of Presentation [Line Items] |  |  |  |
Entity incorporation, date of incorporation |  |  | Nov. 21, 2005 |
Net loss |  |  | $ (22,127) | $ (16,306)
Accumulated deficit |  |  | (149,884) | (127,757)
Cash and cash equivalents |  |  | 74,593 | $ 9,808
Net proceeds from initial public offering |  |  | $ 59,892 |
Number of patients | Patient |  | 67 |  |
Common Stock |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |
Issuance of common stock from initial public offering, net of issuance costs, Shares | shares |  |  | 4,025,000 |
Gross proceeds from initial public offering | $ 64,400 |  |  |
Net proceeds from initial public offering | $ 57,300 |  |  |
IPO | Common Stock |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |
Issuance of common stock from initial public offering, net of issuance costs, Shares | shares | 4,025,000 |  |  |
Shares issued and sold, public offering price | $ / shares | $ 16.00 |  |  |
Exercise of Underwriters' Option | Common Stock |  |  |  |
Organization And Basis Of Presentation [Line Items] |  |  |  |
Issuance of common stock from initial public offering, net of issuance costs, Shares | shares | 525,000 |  |  |

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