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Stockholders' Equity - June 2022 and December 2021 Private Placement (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Dec. 16, 2021 | Jun. 30, 2022 | Dec. 31, 2021 | Jun. 30, 2021 | Sep. 30, 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
Warrants issued (in shares) |  |  |  |  |  |  | 229,414 | 310,860
June 2022 Private Placement |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Sale of common stock (in shares) |  | 1,313,462 |  |  |  |  |  |
Sale of common stock (USD per share) |  |  |  |  | $ 1.30 |  | $ 1.30 |
Securities called by warrants (in shares) |  |  |  |  | 2,692,310 |  | 2,692,310 |
Exercise price of common stock (USD per share) |  |  |  |  | $ 1.30 |  | $ 1.30 |
Amount paid for placement agent commissions |  | $ 252 |  |  |  |  |  |
Amount paid related to expenses for registered direct offering and concurrent private placement |  | 35 |  |  |  |  |  |
Amount paid for clearing fees |  | 47 |  |  |  |  |  |
Offering costs paid on the issuance of common stock and warrants |  | 334 |  |  |  |  |  |
Proceeds from sale of common stock and warrants |  | $ 3,200 |  |  |  |  |  |
Estimated proceeds from issuance of warrants |  |  |  |  | $ 3,500 |  |  |
June 2022 Private Placement | Pre-Funded Warrants |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Securities called by warrants (in shares) |  |  |  |  | 1,378,848 |  | 1,378,848 |
Exercise price of common stock (USD per share) |  |  |  |  | $ 0.0001 |  | $ 0.0001 |
June 2022 Private Placement | Warrants |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Securities called by warrants (in shares) |  |  |  |  | 2,692,310 |  | 2,692,310 |
Exercise price of common stock (USD per share) |  |  |  |  | $ 1.30 |  | $ 1.30 |
December 2021 Private Placement |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Sale of common stock (in shares) |  |  | 1,193,185 |  |  |  |  |
Sale of common stock (USD per share) |  |  | $ 3.52 |  |  |  |  |
Securities called by warrants (in shares) |  |  |  |  | 1,278,413 |  | 1,278,413 |
Exercise price of common stock (USD per share) |  |  |  |  | $ 3.52 |  | $ 3.52 |
Amount paid for placement agent commissions |  |  | $ 360 |  |  |  |  |
Amount paid related to expenses for registered direct offering and concurrent private placement |  |  | 42 |  |  |  |  |
Amount paid for clearing fees |  |  | 97 |  |  |  |  |
Offering costs paid on the issuance of common stock and warrants |  |  | 499 |  |  |  |  |
Proceeds from sale of common stock and warrants |  |  | $ 4,000 |  |  |  |  |
Estimated proceeds from issuance of warrants |  |  |  |  | $ 4,500 |  |  |
December 2021 Private Placement | Pre-Funded Warrants |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Securities called by warrants (in shares) |  |  | 85,228 |  |  |  |  |
Exercise price of common stock (USD per share) |  |  | $ 0.0001 |  |  |  |  |
Warrants issued (in shares) | 85,228 |  |  |  |  |  |  |
December 2021 Private Placement | Warrants |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Securities called by warrants (in shares) |  |  | 1,278,413 |  |  |  |  |
Exercise price of common stock (USD per share) |  |  | $ 3.52 |  |  |  |  |

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