NOTE 15. REVENUES BY PRODUCT CATEGORY AND GEOGRAPHIC REGION AND SIGNIFICANT CONCENTRATIONS

Revenue Information

The following is a summary of our revenues by product category (in thousands):

	Three Months Ended September 30,				Six Months Ended September 30,
Revenues by Product Category	2011		2010		2011		2010
Instruments(1)	$	8,756	$	7,642	$	16,285	$	14,967
Consumables(2)		29,504		25,309		56,211		50,627
Other products		1,718		1,936		3,447		3,805
Product sales, net		39,978		34,887		75,943		69,399
Development and licensing revenue		47		390		85		831
Total revenues	$	40,025	$	35,277	$	76,028	$	70,230

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(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.

The following is a summary of revenues by geographic region based on customer location (in thousands):

	Three Months Ended September 30,				Six Months Ended September 30,
Revenues by Geographic Region	2011		2010		2011		2010
North America	$	31,985	$	29,528	$	61,693	$	57,317
Europe		6,628		4,703		11,810		10,330
Asia Pacific and rest of the world		1,412		1,046		2,525		2,583
Total revenues	$	40,025	$	35,277	$	76,028	$	70,230

Significant Concentrations

Revenues from significant customers as a percentage of total revenues were as follows:

		Three Months Ended September 30,						Six Months Ended September 30,
Distributor	Geographical Location	2011			2010			2011			2010
Walco International, Inc., d/b/a DVM Resources	United States		10	%		10	%		10	%	<10%

At September 30, 2011, one distributor in the United States accounted for 14% of our total receivables balance. At September 30, 2010, one distributor in the United States accounted for 12% of our total receivables balance.