CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
REVENUE:
Product sales	$ 58,491	$ 67,463
Services and other	6,756	6,261
Total revenue	65,247	73,724
COSTS AND EXPENSES:
Cost of product sales	23,565	23,899
Cost of services and other	3,779	3,200
Research and development	13,331	16,268
Selling, general and administrative	27,924	27,212
Total costs and expenses	68,599	70,579
(Loss) income from operations	(3,352)	3,145
Interest income and other, net	26	(1,894)
Interest expense	980	938
(Loss) income before income taxes	(4,306)	313
Income tax (benefit) provision	(89)	274
Net (loss) income	$ (4,217)	$ 39
Basic net (loss) income per common share	$ (0.06)	$ 0.00
Diluted net (loss) income per common share	$ (0.06)	$ 0.00
Shares used in computing basic net (loss) income per common share	69,977	70,648
Shares used in computing diluted net (loss) income per common share	69,977	71,267