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Stock Based Compensation - Narrative (Details) - USD ($) |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
May 28, 2023 | Apr. 18, 2023 | Sep. 30, 2023 | Sep. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022 | Apr. 17, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of options granted (in shares) |  |  |  |  |  | 0 | 0 |  |
Vested stock options expired (in shares) |  |  |  |  |  | 6,668 |  | 501 |
Forfeited (in shares) |  |  |  |  |  |  | 10,000 | 10,000 |
Options, intrinsic value, vested |  |  | $ 0 | $ 0 |  | $ 0 | $ 0 |  |
Stock option compensation expense, forfeiture |  |  |  |  | $ 84,000 |  |  |  |
Unrecognized stock-based compensation expense for stock options |  |  | 92,000 |  |  | 92,000 |  |  |
Stock Options |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Stock option compensation expense |  |  | 31,000 | 31,000 |  | $ 93,000 | 30,000 |  |
Stock option compensation expense, gross |  |  |  |  |  |  | 114,000 |  |
Stock option compensation expense, forfeiture |  |  |  |  |  |  | 84,000 |  |
Cost not yet recognized, period for recognition |  |  |  |  |  | 9 months |  |  |
Restricted Stock |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Stock option compensation expense |  |  | $ 0 | 0 |  | $ 0 | 0 |  |
Unvested restricted shares outstanding (in shares) |  |  | 0 |  |  | 0 |  |  |
Unrecognized stock-based compensation expense for other than options |  |  | $ 0 |  |  | $ 0 |  |  |
Restricted Stock | Director |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Vested, restricted shares (in shares) | 42 |  |  |  |  |  |  |  |
Vesting period | 10 years |  |  |  |  |  |  |  |
RSUs |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Stock option compensation expense |  |  | $ 0 | 0 |  | $ 0 | 0 |  |
Unvested restricted shares outstanding (in shares) |  |  | 0 |  |  | 0 |  |  |
Unrecognized stock-based compensation expense for other than options |  |  | $ 0 |  |  | $ 0 |  |  |
RSUs | Director |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Vested, restricted shares (in shares) | 1,929 |  |  |  |  |  |  |  |
2019 Equity Incentive Plan |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of shares available for grant (in shares) |  |  | 3 |  |  | 3 |  | 177,567 |
Shares granted (in shares) |  | 177,564 |  |  |  |  |  |  |
Stock option compensation expense |  |  | $ 31,000 | 31,000 |  | $ 473,000 | 30,000 |  |
Share price (in dollars per share) |  |  |  |  |  |  |  |  | $ 2.14
2019 Equity Incentive Plan | Stock Options |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Stock option compensation expense |  |  | 31,000 | 31,000 |  | 93,000 | 30,000 |  |
2019 Equity Incentive Plan | RSUs |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Stock option compensation expense |  | $ 380,000 | $ 0 | $ 0 |  | $ 380,000 | $ 0 |  |

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