Segment, Customer and Geographic Information (Tables)

6 Months Ended

Jun. 30, 2012

Segment, Customer and Geographic Information [Abstract]

Customers that accounted for more than 10% of the Company's total product revenue

The Company had the following significant customers that accounted for more than 10% of the Company’s total product revenue, all of which operate in a country outside of the United States, during the three and six months ended June 30, 2012, and 2011 (in percentages):

	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
Movaco, S.A.		21	%		27	%		19	%		27	%
Etablissement Francais du Sang		19	%		15	%		24	%		20	%
AUM+ LTD		13	%		*			*			*
Delrus Inc.		*			*			13	%		*

* Represents an amount less than 10% of product revenue.