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Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Thousands |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 01, 2022 | Mar. 31, 2021 | Mar. 31, 2021 | May 31, 2016 | Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021 | Apr. 07, 2020 | Apr. 12, 2019
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Incremental borrowing rate on operating leases |  |  |  |  | 6.00% |  | 6.00% |  |  |  |
Operating and variable lease costs |  |  |  |  | $ 232 | $ 133 | $ 498 | $ 372 |  |  |
Contractual obligation |  |  |  |  | $ 2,700 |  | $ 2,700 |  |  |  |
Asset purchase agreement, royalties as percent of aggregated net sales |  |  |  | 4.40% |  |  |  |  |  |  |
Common stock, shares issued (in shares) |  |  |  |  | 30,564,995 |  | 30,564,995 |  | 26,335,418 |  | 120,070
Common stock issued |  |  |  |  | $ 3 |  | $ 3 |  | $ 3 |  | $ 1,500
4SC Royalty Settlement (see Note 4) |  |  |  |  | $ 0 | $ 0 | $ 0 | $ 17,250 |  |  |
Immunic AG |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Asset purchase agreement, royalties as percent of aggregated net sales |  | 4.40% |  |  |  |  |  |  |  |  |
4SC Royalty Settlement (see Note 4) |  | $ 17,250 |  |  |  |  |  |  |  |  |
Royalty settlement agreement, cash payment, percent |  | 50.00% | 50.00% |  |  |  |  |  |  |  |
Royalty settlement agreement, shares payment, percent |  | 50.00% | 50.00% |  |  |  |  |  |  |  |
Grafelfing, Germany |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Lease term (in years) |  |  |  |  |  |  |  |  |  | 5 years |
Additions to right-of-use assets | $ 642 |  | $ 435 |  |  |  |  |  |  |  |
New York City |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Rent holiday period |  |  |  |  |  |  | 6 months |  |  |  |

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