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REVENUE FROM CONTRACT WITH CUSTOMERS - Activity of Contract Liability (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Contract with Customer, Liability [Abstract]        
Beginning balance $ 1,989 $ 2,314 $ 2,151 $ 2,476
Revenue recognized (433) (81) (595) (243)
Ending balance $ 1,556 $ 2,233 $ 1,556 $ 2,233