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Organization - Public Offerings (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 1 Months Ended |  |
--- | --- | --- | --- | --- | ---
Apr. 26, 2016 | Mar. 29, 2016 | Feb. 28, 2021 | Mar. 31, 2018 | Sep. 30, 2023 | Dec. 31, 2022
Public Offerings |  |  |  |  |  |
Accumulated deficit |  |  |  |  | $ 328,064 | $ 307,688
Cash, cash equivalents and short-term marketable securities |  |  |  |  | $ 32,200 |
Common stock, par value (in dollars per share) |  |  |  |  | $ 0.0001 | $ 0.0001
Follow-on Public Offering |  |  |  |  |  |
Public Offerings |  |  |  |  |  |
Share offering price |  |  | $ 3.50 | $ 8.50 |  |
Proceeds from sale of stock |  |  | $ 32,000 | $ 64,900 |  |
Issuance of common stock |  |  | 9,783,660 | 8,117,647 |  |
Over-Allotment Option |  |  |  |  |  |
Public Offerings |  |  |  |  |  |
Share offering price | $ 15.00 |  |  |  |  |
Issuance of common stock | 502,618 |  | 1,212,231 | 1,058,823 |  |
IPO |  |  |  |  |  |
Public Offerings |  |  |  |  |  |
Share offering price |  | $ 15.00 |  |  |  |
Net proceeds from IPO | $ 70,600 |  |  |  |  |
Issuance of common stock |  | 4,700,000 |  |  |  |

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