Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENCIES - Expense charged to operations under the operating lease agreements (Details)

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COMMITMENTS AND CONTINGENCIES - Expense charged to operations under the operating lease agreements (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
COMMITMENTS AND CONTINGENCIES.    
Rent expense $ 1.4 $ 1.6