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				6 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Revenue from External Customer [Line Items]
Product and service revenues, net	$ 45,813		$ 44,221		$ 88,945		$ 86,197
Development and licensing revenue	38		37		75		75
Total revenues	45,851		44,258		89,020		86,272
Instruments [Member]
Revenue from External Customer [Line Items]
Product and service revenues, net	13,537	[1]	11,607	[1]	22,212	[1]	21,487	[1]
Consumables [Member]
Revenue from External Customer [Line Items]
Product and service revenues, net	28,699	[2]	29,412	[2]	59,298	[2]	58,894	[2]
Other Products And Services [Member]
Revenue from External Customer [Line Items]
Product and service revenues, net	$ 3,577	[3]	$ 3,202	[3]	$ 7,435	[3]	$ 5,816	[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.