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Stock Incentive Plans - Inducement plan (Details) - shares |  |  | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 02, 2023 | Feb. 01, 2023 | Dec. 31, 2023 | Dec. 15, 2023 | Dec. 14, 2023 | Jan. 31, 2023 | Jan. 30, 2023 | Feb. 17, 2022
2022 Inducement Stock Incentive Plan |  |  |  |  |  |  |  |
Stock Incentive Plans |  |  |  |  |  |  |  |
Number of shares authorized |  |  |  | 1,700,000 | 700,000 | 700,000 | 300,000 | 300,000
Number of grants issued |  |  | 687,900 |  |  |  |  |
2015 Plan |  |  |  |  |  |  |  |
Stock Incentive Plans |  |  |  |  |  |  |  |
Number of shares issued |  | 855,000 |  |  |  |  |  |
Number of additional shares authorized | 4,300,000 |  |  |  |  |  |  |
Number of stock options remain outstanding |  |  | 755,000 |  |  |  |  |

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