Quarterly report pursuant to Section 13 or 15(d)

INVENTORIES - Summary of Inventories (Details)

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INVENTORIES - Summary of Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
INVENTORIES    
Raw materials and supplies $ 58,160 $ 89,611
Work in process 909 387
Finished goods 49,716 31,131
Total inventories $ 108,785 $ 121,129