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Stockholders' Equity - June 2021 Equity Offering (Details) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended
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Jun. 30, 2021 | Sep. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Amount paid for clearing fees | $ 18 |  |  |  |  |
Offering costs paid on the issuance of common stock and warrants |  | $ 0 |  | $ 1 | $ 334 | $ 470
Institutional investors |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Sale of common stock (in shares) | 990,100 |  |  |  |  |
Sale of common stock (USD per share) | $ 5.05 |  |  |  |  |
Amount paid for placement agent commissions | $ 400 |  |  |  |  |
Amount paid related to expenses for registered direct offering and concurrent private placement | 51 |  |  |  |  |
Offering costs paid on the issuance of common stock and warrants |  |  | $ 469 |  |  |
Proceeds from sale of common stock and warrants | $ 4,500 |  |  |  |  |

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