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Inventory (Tables)
 12 Months Ended
Mar. 31, 2020
Inventory [Abstract]  
Inventory Net
Inventory is comprised of the following:
 
  
March 31, 2020
  
March 31, 2019
 
Raw materials
 
$
99,360,000
  
$
95,757,000
 
Work in process
  
3,906,000
   
3,502,000
 
Finished goods
  
135,601,000
   
146,366,000
 
 
  
238,867,000
   
245,625,000
 
Less allowance for excess and obsolete inventory
  
(13,208,000
)
  
(11,899,000
)
Total
 
$
225,659,000
  
$
233,726,000
 
Inventory unreturned
 
$
9,021,000
  
$
8,469,000