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LEASES - Summary of Operating Lease Cost and Supplemental Cash Flow Information Related to Operating Leases (Details) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Mar. 31, 2020
Leases [Abstract]        
Operating lease cost $ 757 $ 1,372 $ 535 $ 1,072
Non-cash activity:        
Right-of-use assets obtained in exchange for lease obligations $ 5,351 $ 10,071