NOTE 18.

REVENUES BY PRODUCT CATEGORY AND GEOGRAPHIC REGION AND SIGNIFICANT CONCENTRATIONS

Revenue Information

The following is a summary of our revenues by product category and represents our results from continuing operations (in thousands):

	Three Months Ended September 30,				Six Months Ended September 30,
Revenues by Product Category	2015		2014		2015		2014
Instruments (1)	$	11,597	$	10,105	$	20,309	$	17,699
Consumables (2)		41,675		38,138		83,472		72,424
Other products (3)		2,703		2,191		5,247		4,328
Product sales, net		55,975		50,434		109,028		94,451
Development and licensing revenues		-		37		37		74
Total revenues	$	55,975	$	50,471	$	109,065	$	94,525

(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 include products using the Orbos process and extended maintenance agreements.

The following is a summary of our revenues by geographic region based on customer location and represents our results from continuing operations (in thousands):

	Three Months Ended September 30,				Six Months Ended September 30,
Revenues by Geographic Region	2015		2014		2015		2014
North America	$	45,176	$	41,039	$	87,487	$	75,956
Europe		8,262		7,244		15,985		14,528
Asia Pacific and rest of the world		2,537		2,188		5,593		4,041
Total revenues	$	55,975	$	50,471	$	109,065	$	94,525

Significant Concentrations

During the three months ended September 30, 2015, three distributors in the United States, MWI Veterinary Supply, Inc., Henry Schein Animal Health and Patterson Companies, Inc. accounted for 20%, 12% and 12%, respectively, of our total worldwide revenues. During the six months ended September 30, 2015, three distributors in the United States, MWI Veterinary Supply, Inc., Henry Schein Animal Health and Patterson Companies, Inc. accounted for 20%, 12% and 10%, respectively, of our total worldwide revenues. Starting in the second quarter of fiscal 2016, our revenues from Patterson Companies, Inc. include both Patterson’s veterinary business and Animal Health International, Inc., as a result of Patterson’s recent acquisition.

During the three months ended September 30, 2014, one distributor in the United States, MWI Veterinary Supply, accounted for 20% of our total worldwide revenues. During the six months ended September 30, 2014, one distributor in the United States, MWI Veterinary Supply, accounted for 18% of our total worldwide revenues.

Concentration of credit risk with respect to accounts receivable is primarily limited to certain distributors to whom we make significant sales. One distributor in the United States accounted for 23% of our total receivable balance as of September 30, 2015. One distributor in the United States accounted for 26% of our total receivable balance as of March 31, 2015.