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Inventories
12 Months Ended
Mar. 31, 2019
Inventory Disclosure [Abstract]  
Inventories Inventories
 
 
March 31,
 
 
2019
 
2018
Raw materials
 
$
138,718

 
$
92,216

Work-in-process
 
129,736

 
136,068

Finished goods
 
235,415

 
185,950

Total
 
$
503,869

 
$
414,234