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WARRANTY RESERVES (Details) - USD ($)
$ in Thousands
12 Months Ended
Oct. 31, 2013
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2014
Change in accrued warranty reserve [Roll Forward]        
Balance at beginning of period   $ 3,156 $ 1,868 $ 1,384
Provision for warranty expense   1,615 2,647 2,068
Warranty costs incurred   (1,340) (1,359) (1,584)
Adjustment to pre-existing warranties   (223) 0 0
Balance at end of period   3,208 3,156 1,868
Non-current portion of warranty reserve   1,927 1,733 821
Current portion of warranty reserve   $ 1,281 1,423 1,047
Instruments [Member] | Minimum [Member]        
Product Warranty Liabilities [Line Items]        
Period of coverage for standard warranty obligation on instruments   1 year    
Change in period of coverage for standard warranty obligations on certain instruments 3 years      
Instruments [Member] | Maximum [Member]        
Product Warranty Liabilities [Line Items]        
Period of coverage for standard warranty obligation on instruments   5 years    
Change in period of coverage for standard warranty obligations on certain instruments 5 years      
Reagent Discs [Member]        
Change in accrued warranty reserve [Roll Forward]        
Provision for warranty expense   $ 400 200 $ 500
Warranty reserve, balance at end of period   $ 500 $ 500