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SHAREHOLDERS' EQUITY - Non-vested Options Outstanding and Exercisable (Details) - $ / shares shares in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares |  |  |
Stock options granted (in shares) |  | 95 | 510
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value |  |  |
Stock options granted (in dollars per share) |  | $ 1.22 | $ 1.22
Amended and Restated Equity Incentive Plan and Non-related Plan Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares |  |  |
Balance at the beginning of the period (in shares) | 390 |  |
Stock options cancelled/forfeited (in shares) | (99) |  |
Stock options vested (in shares) | (165) |  |
Balance at the end of the period (in shares) | 126 | 390 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value |  |  |
Balance at the beginning of the period (in dollars per share) | $ 4.26 |  |
Stock options cancelled/forfeited (in dollars per share) | 4.16 |  |
Stock options vested (in dollars per share) | 4.40 |  |
Balance at the end of the period (in dollars per share) | $ 4.15 | $ 4.26 |

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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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- Definition Weighted average grant-date fair value of non-vested options forfeited. + References No definition available. + Details
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