SEGMENT REPORTING INFORMATION (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
SEGMENT REPORTING INFORMATION [Abstract]
Minimum percentage of revenues or gross profit (loss) in order for customer group to be identified as reportable segment (in hundredths)					10.00%
Number of reportable segments					2
Segment Reporting Information [Line Items]
Revenue	$ 44,258		$ 40,025		$ 86,272		$ 76,028
Cost of revenues	21,135		18,004		40,300		34,784
Gross Profit	23,123		22,021		45,972		41,244
Medical Market [Member]
Segment Reporting Information [Line Items]
Revenue	7,874		7,333		16,290		14,489
Cost of revenues	3,311		3,323		6,686		6,666
Gross Profit	4,563		4,010		9,604		7,823
Veterinary Market [Member]
Segment Reporting Information [Line Items]
Revenue	34,939		31,548		67,434		59,217
Cost of revenues	16,173		13,017		30,211		25,421
Gross Profit	18,766		18,531		37,223		33,796
Other Market [Member]
Segment Reporting Information [Line Items]
Revenue	1,445	[1]	1,144	[1]	2,548	[1]	2,322	[1]
Cost of revenues	1,651	[1]	1,664	[1]	3,403	[1]	2,697	[1]
Gross Profit	$ (206)	[1]	$ (520)	[1]	$ (855)	[1]	$ (375)	[1]

[1] Represents unallocated items, not specifically identified to any particular business segment.