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EQUITY-BASED INCENTIVE PLANS - Option Activity (Details) $ / shares in Units, $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2023 USD ($) $ / shares shares | Dec. 31, 2022 USD ($) $ / shares shares
Options |  |
Options granted (in shares) | shares | 243,319 |
Aggregate Intrinsic Value |  |
Aggregate intrinsic value, options exercisable, vested and expected to vest | $ | $ 28 |
Weighted Average Remaining Contractual Life |  |
Remaining contractual term, options expected to vest | 2 years 1 month 6 days |
Options |  |
Options |  |
Number of options outstanding, beginning (in shares) | shares | 1,310,417 |
Options exercised (in shares) | shares | (67,500) |
Options forfeited/expired (in shares) | shares | (378,049) |
Number of options outstanding, ending (in shares) | shares | 1,108,187 | 1,310,417
Options exercisable (in shares) | shares | 309,999 |
Options expected to vest (in shares) | shares | 1,108,187 |
Unrecognized stock-based compensation expense | $ | $ 897 |
Weighted average remaining vesting period | 2 years 1 month 6 days |
Weighted Average Exercise Price |  |
Weighted average exercise price outstanding, beginning (in usd per share) | $ / shares | $ 4.29 |
Weighted average exercise price outstanding, nonvested options granted (in usd per share) | $ / shares | 4.27 |
Weighted average exercise price outstanding, options exercised (in usd per share) | $ / shares | 3.48 |
Weighted average exercise price outstanding, options forfeited/expired (in usd per share) | $ / shares | 4.76 |
Weighted average exercise price outstanding, ending (in usd per share) | $ / shares | 4.18 | $ 4.29
Weighted average exercise price, options exercisable (in usd per share) | $ / shares | 4.67 |
Weighted average exercise price outstanding, options vested and expected to vest (in usd per share) | $ / shares | $ 4.18 |
Aggregate Intrinsic Value |  |
Aggregate intrinsic value, options outstanding | $ | $ 28 | $ 535
Aggregate intrinsic value, options exercised | $ | 57 |
Aggregate intrinsic value, options forfeited/expired | $ | 72 |
Aggregate intrinsic value, options exercisable | $ | $ 10 |
Weighted Average Remaining Contractual Life |  |
Remaining contractual term, options outstanding | 8 years 1 month 6 days | 8 years
Remaining contractual term, options exercisable | 6 years 7 months 6 days |
Remaining contractual term, options expected to vest | 8 years 1 month 6 days |

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- Definition Amount of cost not yet recognized for nonvested award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (e)(1) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(03) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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