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LEASES (Details) - Rent Expense Components - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Rent Expense Components [Abstract]        
Operating lease cost $ 496 $ 540 $ 1,610 $ 1,613
Sublease income (11) (11) (32) (107)
Net rent expense $ 485 $ 529 $ 1,578 $ 1,506