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STOCK OPTIONS - Summary of Nonvested Stock Options (Details) - $ / shares | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Number of options |  |
Number of Options Non-vested at beginning of period (in shares) | 1,802,216 |
Number of Options Non-vested, Granted (in shares) | 1,692,417 | 894,980
Number of Options Non-vested, Vested (in shares) | (1,028,867) |
Number of Options Non-vested, Forfeited (in shares) | (238,158) |
Number of Options Non-vested at end of period (in shares) | 2,227,608 | 1,802,216
Weighted average grant date fair value |  |
Weighted average grant date fair value, Non-vested Options at beginning of period (in dollars per share) | $ 5.21 |
Weighted average grant date fair value, Non-vested Options, Granted (in dollars per share) | 6.71 | $ 5.76
Weighted average grant date fair value, Non-vested Options, Vested (in dollars per share) | 5.11 |
Weighted average grant date fair value, Non-vested Options, Forfeited (in dollars per share) | 6.23 |
Weighted average grant date fair value, Non-vested Options at end of period (in dollars per share) | $ 6.27 | $ 5.21

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- Definition Gross number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Number of non-vested options outstanding. + References No definition available. + Details
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