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Inventory
3 Months Ended
Jun. 30, 2019
Inventory [Abstract]  
Inventory
5. Inventory

Inventory–net is comprised of the following:

  
June 30, 2019
  
March 31, 2019
 
Inventory - net
      
Raw materials
 
$
101,544,000
  
$
95,757,000
 
Work-in-process
  
4,593,000
   
3,502,000
 
Finished goods
  
168,992,000
   
146,366,000
 
   
275,129,000
   
245,625,000
 
Less allowance for excess and obsolete inventory
  
(13,013,000
)
  
(11,899,000
)
Total inventory - net
 
$
262,116,000
  
$
233,726,000
 
Inventory unreturned
 
$
8,349,000
  
$
8,469,000