CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Revenues:
Product revenue	$ 26,711	$ 20,486	$ 51,653	$ 40,854
Service revenue	6,823	5,343	14,055	10,424
License fees and contract revenue	4,807	3,221	8,453	6,424
Total revenue	38,341	29,050	74,161	57,702
Costs and expenses:
Cost of product revenue	13,602	10,101	26,497	20,396
Cost of service revenue	3,916	3,317	7,612	6,507
Cost of license revenue	971	521	1,616	926
Research and development	5,510	4,299	10,902	8,646
Selling, general and administrative	13,542	10,745	27,262	21,604
Amortization of intangible assets	2,503	1,226	3,944	2,480
Restructuring charges, net	1,399	603	2,263	634
Total costs and expenses	41,443	30,812	80,096	61,193
Operating loss	(3,102)	(1,762)	(5,935)	(3,491)
Interest expense, net	(50)	(72)	(85)	(202)
Gain on divestiture (Note 3)		11,424		11,424
Other income (expense), net	91	(37)	403	(389)
Net income (loss) before income taxes	(3,061)	9,553	(5,617)	7,342
Provision for income taxes	(178)	(316)	(217)	(323)
Net income (loss)	$ (3,239)	$ 9,237	$ (5,834)	$ 7,019
Net income (loss) per share, basic (in dollars per share)	$ (0.06)	$ 0.18	$ (0.11)	$ 0.14
Net income (loss) per share, diluted (in dollars per share)	$ (0.06)	$ 0.18	$ (0.11)	$ 0.14
Shares used in computing net income (loss) per common share, basic (in shares)	52,417	50,070	52,236	49,776
Shares used in computing net income (loss) per common share, diluted (in shares)	52,417	52,002	52,236	51,812