REVENUES BY PRODUCT AND SERVICE CATEGORY AND GEOGRAPHIC REGION AND SIGNIFICANT CONCENTRATIONS, Revenue by product and Services (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2013		Jun. 30, 2012
Revenue from External Customer [Line Items]
Product and service revenues, net	$ 43,132		$ 41,976
Development and licensing revenue	37		38
Total revenues	43,169		42,014
Instruments [Member]
Revenue from External Customer [Line Items]
Product and service revenues, net	8,675	[1]	9,880	[1]
Consumables [Member]
Revenue from External Customer [Line Items]
Product and service revenues, net	30,599	[2]	29,482	[2]
Other Products And Services [Member]
Revenue from External Customer [Line Items]
Product and service revenues, net	$ 3,858	[3]	$ 2,614	[3]

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

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

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