CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
REVENUE:
Product sales	$ 302,618	$ 266,063	$ 241,273
Services and other	27,781	29,560	26,201
Total revenue	330,399	295,623	267,474
COSTS AND EXPENSES:
Cost of product sales	133,982	116,261	97,815
Cost of services and other	15,379	15,874	13,137
Research and development	47,670	57,881	63,591
Selling, general and administrative	141,430	142,853	109,572
Restructuring charges	4,490	1,845	0
Total costs and expenses	342,951	334,714	284,115
Loss from operations	(12,552)	(39,091)	(16,641)
Interest income and other, net	802	(265)	(6,302)
Interest expense	12,711	7,193	3,813
Gain on sale of product line	9,295	0	0
Loss before income taxes	(15,166)	(46,549)	(26,756)
Income tax (benefit) provision	1,161	(35,853)	1,405
Net loss	$ (16,327)	$ (10,696)	$ (28,161)
Basic and diluted net loss per common share (in dollars per share)	$ (0.23)	$ (0.15)	$ (0.40)
Shares used in computing basic and diluted net loss per common share (in shares)	71,441	70,300	70,877