Stock-Based Compensation - Stock option plan (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 9 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|
Sep. 30, 2023 |
Jun. 30, 2023 |
Mar. 31, 2023 |
Sep. 30, 2023 |
Sep. 30, 2022 |
Dec. 31, 2022 |
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| Shares Underlying Options | ||||||
| Outstanding at beginning (in shares) | 857,957 | 495,083 | 497,402 | 497,402 | ||
| Granted (in dollars per share) | 35,625 | 375,168 | 0 | 410,793 | 0 | |
| Forfeited (in dollars per share) | (16,355) | (12,294) | (2,287) | |||
| Exercised (in dollars per share) | 0 | 0 | (32) | |||
| Outstanding at ending (in shares) | 877,227 | 857,957 | 495,083 | 877,227 | 497,402 | |
| Exercisable at the end (in shares) | 482,906 | 482,906 | ||||
| Weighted Average Exercise Price | ||||||
| Outstanding at beginning (in dollars per share) | $ 4.14 | $ 5.16 | $ 5.16 | $ 5.16 | ||
| Granted (in dollars per share) | 3.26 | 2.74 | 0 | |||
| Forfeited (in dollars per share) | 3.73 | 2.88 | 3.78 | |||
| Exercised (in dollars per share) | 0 | 0 | 3.92 | |||
| Outstanding at ending (in dollars per share) | 4.11 | $ 4.14 | $ 5.16 | 4.11 | $ 5.16 | |
| Exercisable (in dollars per share) | $ 5.20 | $ 5.20 | ||||
| Weighted Average Remaining Contractual Term (in years) | ||||||
| Outstanding (in years) | 6 years 5 months 15 days | 6 years 6 months 18 days | 4 years 4 months 13 days | 5 years 8 months 1 day | ||
| Exercisable at the end | 3 years 10 months 28 days | |||||
| Aggregate Intrinsic Value, Outstanding at end | $ 162 | $ 374 | $ 0 | $ 162 | ||
| Aggregate Intrinsic Value, Exercisable at end | $ 67 | $ 67 | ||||
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- Definition Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price Rollforward No definition available.
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- References No definition available.
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Gross number of share options (or share units) granted during the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Number of fully vested and expected to vest exercisable options that may be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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