Nature Of Business And Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2011

Nature Of Business And Summary Of Significant Accounting Policies [Abstract]

Schedule Of Property And Equipment, Estimated Useful Lives

	Years
Laboratory equipment		5
Furniture and fixtures		5
Computers, software and office equipment		3

Schedule Of Percent Of Total Revenue Associated With Each Major Customer

	Percent of total  revenues for the years ended December 31,
	2011		2010		2009
Distributor A		17%		NA		NA
Distributor B		16%		NA		NA
Distributor C		10%		NA		NA
Collaborator A		29%		15%		NA
Collaborator B		NA		77%		80%

Schedule Of Concentration Of Accounts Receivable Attributable To Certain Major Customers

	Percent of total  accounts receivable at December 31,
	2011		2010
Distributor A		31%		NA
Distributor B		30%		NA
Distributor C		18%		NA
Collaborator A		14%		52%
Collaborator C		NA		42%

Schedule Of Weighted-Average Shares That Have Been Excluded From The Number Of Shares Used To Calculate Basic And Diluted Net Loss Per Share

	Years ended December 31,
	2011		2010		2009
Warrants to purchase common stock		991		1,113		1,651
Stock options and restricted stock units		13,236		11,395		9,661
Total		14,227		12,508		11,312