REVENUES BY PRODUCT AND SERVICE CATEGORY AND GEOGRAPHIC REGION AND SIGNIFICANT CONCENTRATIONS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2012		Jun. 30, 2011
Revenue from External Customer [Line Items]
Product and service revenues, net	$ 41,976		$ 35,965
Development and licensing revenue	38		38
Total revenues	42,014		36,003
Revenues from External Customers [Line Items]
Revenues	42,014		36,003
Worldwide Revenues [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Number of major customers	1		1
Revenue by major customer (in hundredths)	13.00%		11.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Number of major customers	1		1
Revenue by major customer (in hundredths)	17.00%		19.00%
North America [Member]
Revenue from External Customer [Line Items]
Total revenues	33,164		29,708
Revenues from External Customers [Line Items]
Revenues	33,164		29,708
Europe [Member]
Revenue from External Customer [Line Items]
Total revenues	7,216		5,182
Revenues from External Customers [Line Items]
Revenues	7,216		5,182
Asia Pacific and rest of the world [Member]
Revenue from External Customer [Line Items]
Total revenues	1,634		1,113
Revenues from External Customers [Line Items]
Revenues	1,634		1,113
Instruments [Member]
Revenue from External Customer [Line Items]
Product and service revenues, net	9,880	[1]	7,529	[1]
Consumables [Member]
Revenue from External Customer [Line Items]
Product and service revenues, net	29,482	[2]	26,707	[2]
Other products and services [Member]
Revenue from External Customer [Line Items]
Product and service revenues, net	$ 2,614	[3]	$ 1,729	[3]

[1] Instruments include chemistry analyzers, hematology instruments, VSpro coagulation and specialty analyzers and i-STAT analyzers.

[2] Consumables include reagent discs, hematology reagent kits, VSpro coagulation and specialty cartridges, i-STAT cartridges and rapid tests.

[3] Other products and services include veterinary reference laboratory diagnostic and consulting services.