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ORDINARY SHARE AND SHARE INCENTIVE PLANS - Unvested Restricted Awards - Additional Information (Details) - 2017 Equity Incentive Plan - Restricted Stock shares in Thousands, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 USD ($) shares | Dec. 31, 2022 USD ($) shares
Restricted stock awards |  |
Vesting period | 4 years |
Ratio for grant of stock awards that is deducted from the shares available for grant | 1 |
Shares |  |
Vested (in shares) | (38) | (44)
Fair value of restricted stock awards vested | $ | $ 0.2 | $ 0.4
Granted (in shares) | 30 | 29

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