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Stock Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 13, 2023 | Jun. 30, 2023 | Jan. 31, 2023 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022 | Jun. 14, 2022 | Oct. 31, 2020
Stock-based compensation |  |  |  |  |  |  |  |  |  |
Common stock, shares issued |  |  |  | 12,642,822 |  | 12,642,822 |  | 9,422,089 |  |
Options exercised (in shares) |  |  |  |  |  | 0 | 0 |  |  |
Stock-based compensation costs before income taxes |  |  |  | $ 390 | $ 389 | $ 1,151 | $ 1,119 |  |  |
Stock options |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  |  |  |  |
Options granted (in shares) |  |  |  |  |  | 650,128 | 522,337 |  |  |
Stock options | Options Vesting On Third Anniversary Of Grant [Member] |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  |  |  |  |
Stock awards vesting period |  |  |  |  |  | 3 years |  |  |  |
Options granted (in shares) |  |  |  |  |  | 384,500 |  |  |  |
Stock options | Minimum |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  |  |  |  |
Options granted, grant date fair value |  |  |  |  |  | $ 0.42 | $ 0.83 |  |  |
Stock options | Maximum |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  |  |  |  |
Options granted, grant date fair value |  |  |  |  |  | $ 0.73 | $ 2.90 |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  |  |  |  |
Stock awards vesting period |  |  | 3 years |  |  |  |  |  |  |
Options granted, grant date fair value |  | $ 0.59 |  |  |  |  |  |  |  |
Restricted Stock Units, Granted |  | 127,314 | 257,000 |  |  |  |  | 118,665 |  |
Restricted Stock Units outstanding/unvested |  |  |  | 521,971 |  | 521,971 |  |  |  |
Restricted stock units, grant date fair value |  |  | $ 0.90 | $ 1.08 |  | $ 1.08 |  | $ 1.11 |  |
Modified Stock Options And Restricted Stock Units [Member] |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  |  |  |  |
Restricted Stock Units, Granted |  |  |  |  |  | 384,314 |  |  |  |
2018 Equity Incentive Plan (the "2018 Plan") [Member] |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  |  |  |  |
Number of shares reserved for issuance | 336,984 |  |  |  |  |  |  |  |  |
Life of stock option awards granted | 10 years |  |  |  |  |  |  |  |  |
Number of authorized shares | 900,000 |  |  |  |  |  |  |  | 500,000 |
2018 Equity Incentive Plan (the "2018 Plan") [Member] | Minimum |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  |  |  |  |
Stock awards vesting period | 1 year |  |  |  |  |  |  |  |  |
2018 Equity Incentive Plan (the "2018 Plan") [Member] | Maximum |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  |  |  |  |
Stock awards vesting period | 4 years |  |  |  |  |  |  |  |  |
Inducement Equity Incentive Plan 2020 [Member] |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  |  |  |  |
Number of shares reserved for issuance |  |  |  | 80,000 |  | 80,000 |  |  |  |
Common stock, shares issued |  |  |  | 120,000 |  | 120,000 |  |  |  |
Inducement Equity Incentive Plan 2020 [Member] | Minimum |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  |  |  |  |
Number of authorized shares |  |  |  |  |  |  |  |  |  | 200,000

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