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, 2014		Jun. 30, 2013
Revenue from External Customer [Line Items]
Product and service revenues, net	$ 47,440		$ 43,132
Development and licensing revenue	37		37
Total revenues	47,477		43,169
Instruments [Member]
Revenue from External Customer [Line Items]
Product and service revenues, net	7,594	[1]	8,675	[1]
Consumables [Member]
Revenue from External Customer [Line Items]
Product and service revenues, net	34,286	[2]	30,599	[2]
Other Products And Services [Member]
Revenue from External Customer [Line Items]
Product and service revenues, net	$ 5,560	[3]	$ 3,858	[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.