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Inventory
6 Months Ended
Sep. 30, 2020
Inventory [Abstract]  
Inventory
4. Inventory

Inventory is comprised of the following:

 
 
September 30, 2020
   
March 31, 2020
 
Inventory
           
Raw materials
 
$
106,790,000
   
$
99,360,000
 
Work-in-process
   
8,527,000
     
3,906,000
 
Finished goods
   
128,101,000
     
135,601,000
 
 
   
243,418,000
     
238,867,000
 
Less allowance for excess and obsolete inventory
   
(13,752,000
)
   
(13,208,000
)
Inventory — net
   
229,666,000
     
225,659,000
 
Inventory unreturned
   
10,352,000
     
9,021,000
 
Total inventory
 
$
240,018,000
   
$
234,680,000