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WARRANTY RESERVES (Tables)
 3 Months Ended
Jun. 30, 2015
WARRANTY RESERVES [Abstract]  
Change in Accrued Warranty Reserve
The change in our accrued warranty reserve during the three months ended June 30, 2015 and 2014 is summarized as follows (in thousands):
 
  
Three Months Ended
June 30,
 
  
2015
  
2014
 
Balance at beginning of period
 
$
3,156
  
$
1,868
 
Provision for warranty expense
  
260
   
392
 
Warranty costs incurred
  
(324
)
  
(387
)
Adjustment to pre-existing warranties
  
(223
)
  
-
 
Balance at end of period
  
2,869
   
1,873
 
Non-current portion of warranty reserve
  
1,547
   
912
 
Current portion of warranty reserve
 
$
1,322
  
$
961