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STOCK-BASED COMPENSATION - 2015 EIP Stock Options and Other (Details) - 2015 Plan - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Mar. 19, 2021 | Mar. 18, 2021 | Mar. 23, 2017 | Mar. 22, 2017 | Jun. 26, 2015
Stock options |  |  |  |  |  |  |  |
Aggregate number of shares of common stock available for awards |  |  |  | 4,750,000 | 2,750,000 | 2,750,000 | 400,000 | 400,000
Non-employee directors |  |  |  |  |  |  |  |
Additional disclosures |  |  |  |  |  |  |  |
Maximum annual limit for grants (in shares) |  |  |  |  |  | 500,000 |  |
Other individuals |  |  |  |  |  |  |  |
Additional disclosures |  |  |  |  |  |  |  |
Maximum annual limit for grants (in shares) |  |  |  |  |  | 1,000,000 |  |
Employee Stock Option |  |  |  |  |  |  |  |
Unrecognized compensation cost |  |  |  |  |  |  |  |
Unamortized compensation cost | $ 0 |  |  |  |  |  |  |
Number of Options |  |  |  |  |  |  |  |
Outstanding at beginning of period (in shares) | 368,190 |  |  |  |  |  |  |
Exercised (in shares) | (65,245) |  |  |  |  |  |  |
Outstanding at end of period (in shares) | 302,945 | 368,190 |  |  |  |  |  |
Weighted Average Exercise Price |  |  |  |  |  |  |  |
Outstanding at beginning of period (in dollars per share) | $ 7.93 |  |  |  |  |  |  |
Exercised (in dollars per share) | 8.03 |  |  |  |  |  |  |
Outstanding at end of period (in dollars per share) | 7.91 | $ 7.93 |  |  |  |  |  |
Weighted Average Fair Value |  |  |  |  |  |  |  |
Outstanding at beginning of period (in dollars per share) | 2.82 |  |  |  |  |  |  |
Exercised (in dollars per share) | 3.09 |  |  |  |  |  |  |
Outstanding at end of period (in dollars per share) | $ 2.76 | $ 2.82 |  |  |  |  |  |
Options Exercisable, Number of options | 302,945 |  |  |  |  |  |  |
Options Exercisable, Weighted Average Exercise Price | $ 7.91 |  |  |  |  |  |  |
Options Exercisable, Weighted Average Fair Value (in dollars per share) | $ 2.76 |  |  |  |  |  |  |
Options Exercisable, Weighted Average Remaining Contractual Life | 1 year 4 months 17 days |  |  |  |  |  |  |
Employee Stock Option | General and administrative expense |  |  |  |  |  |  |  |
Stock options |  |  |  |  |  |  |  |
Amortization expense | $ 6 | $ 83 | $ 278 |  |  |  |  |

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