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Inventories (Tables)
 12 Months Ended
Mar. 31, 2020
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current
Inventories consisted of the following:

 
 
March 31,
 
 
2020
 
2019
At cost—FIFO basis:
 
 
 
 
Raw materials
 
$
85,452

 
$
88,786

Work-in-process
 
25,876

 
32,547

Finished goods
 
33,216

 
40,523

 
 
144,544


161,856

LIFO cost less than FIFO cost
 
(17,171
)
 
(15,593
)
Net inventories
 
$
127,373


$
146,263