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SIGNIFICANT ACCOUNTING POLICIES - Deferred revenue (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
SIGNIFICANT ACCOUNTING POLICIES    
Balance, at the beginning of the year $ 52,586 $ 54,616
Revenue recognized (17,469) (38,625)
Increase in deferred revenues and customer advances 20,613 36,595
Balance, at the end of the year 55,730 52,586
Less current portion at the end of the year (38,820) (36,634)
Long-term portion at the end of the year $ 16,910 $ 15,952