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INVENTORY (Tables)
3 Months Ended
Jun. 30, 2018
Inventory Disclosure [Abstract]  
Inventory balances by category
Inventory balances by category were as follows:
 
June 30, 2018
 
March 31, 2018
Finished products
$
9,362

 
$
13,940

Parts and supplies
1,280

 
1,222

Inventory
$
10,642

 
$
15,162