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Inventory
9 Months Ended
Dec. 31, 2014
Inventory [Abstract]  
Inventory
6. Inventory

Inventory is comprised of the following:

  
December 31, 2014
  
March 31, 2014
 
Non-core inventory
    
Raw materials
 
$
19,203,000
  
$
18,787,000
 
Work-in-process
  
265,000
   
124,000
 
Finished goods
  
41,022,000
   
30,197,000
 
   
60,490,000
   
49,108,000
 
Less allowance for excess and obsolete inventory
  
(1,959,000
)
  
(1,862,000
)
Total
 
$
58,531,000
  
$
47,246,000
 
         
Inventory unreturned
 
$
8,046,000
  
$
7,534,000
 
Long-term core inventory
        
Used cores held at the Company's facilities
 
$
25,797,000
  
$
23,718,000
 
Used cores expected to be returned by customers
  
8,294,000
   
6,160,000
 
Remanufactured cores held in finished goods
  
21,698,000
   
18,093,000
 
Remanufactured cores held at customers' locations
  
98,560,000
   
96,351,000
 
   
154,349,000
   
144,322,000
 
Less allowance for excess and obsolete inventory
  
(701,000
)
  
(846,000
)
Total
 
$
153,648,000
  
$
143,476,000
 
         
Long-term core inventory deposits
 
$
31,571,000
  
$
29,375,000