CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Net revenues:
Product revenues	$ 19,700	$ 41,703	$ 50,709
Service revenues	8,555	8,119	5,398
Total net revenues	28,255	49,822	56,107
Cost of revenues:
Cost of product revenues	6,641	17,992	21,393
Provision for excess and obsolete inventories	228	773	678
Cost of service revenues	3,454	3,259	2,552
Total cost of revenues	10,323	22,024	24,623
Gross profit	17,932	27,798	31,484
Operating expenses:
Research and development	18,885	15,994	19,132
Marketing and sales	7,335	7,784	10,413
General and administrative	7,457	7,479	8,038
Restructuring (credits) charges, net	(5,558)	398	(6,257)
Impairment of goodwill and other intangibles	14,312	0	10,075
Reversal of accrued royalties, net	(2,363)	(418)	(197)
Total operating expenses	40,068	31,237	41,204
Operating loss	(22,136)	(3,439)	(9,720)
Other (expense) income:
Other income (expense)	18	426	(750)
Impairment of investments in non-publicly traded companies	0	0	(31)
Interest:
Interest income	125	84	122
Interest expense	(243)	(704)	(787)
Interest expense, net	(118)	(620)	(665)
Total other expense, net	(100)	(194)	(1,446)
Loss before income taxes	(22,236)	(3,633)	(11,166)
Income taxes	636	976	365
Net loss	$ (22,872)	$ (4,609)	$ (11,531)
Basic and diluted loss per common share:
Net loss (in dollars per share)	$ (0.82)	$ (0.21)	$ (0.58)
Average common shares outstanding (in shares)	27,911	22,162	19,938