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INVENTORY (Tables)
9 Months Ended
Dec. 31, 2019
Inventory Disclosure [Abstract]  
Inventory balances by category
Inventory balances by category were as follows:
 December 31, 2019March 31, 2019
Finished products$23,231  $24,847  
Parts and supplies1,195  3,353  
Inventory$24,426  $28,200