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ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES. (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Reduction in certain accrued expense and accounts payable | $ 0.0 | $ 0.1
Accrued expenses |  |
Gain (Loss) On Writeoff Of Accounts Payable | 0.4 |
Accrued Liabilities |  |
Gain (Loss) On Writeoff Of Accounts Payable | 1.7 |
Accounts Payable |  |
Gain (Loss) On Writeoff Of Accounts Payable | $ 1.3 |

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