Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2011

Stock-Based Compensation (Tables) [Abstract]

Total stock-based compensation expense

	Three months ended				Six months ended
	June 30,				June 30,
	2011		2010		2011		2010
Cost of goods sold	$	330	$	229	$	662	$	435
Research and development expense		2,120		1,734		4,089		3,301
General and administrative expense		2,430		2,398		4,931		4,369
Total stock-based compensation	$	4,880	$	4,361	$	9,682	$	8,105