CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net revenues:
Product revenues	$ 2,098	$ 3,162
Intellectual property and service revenues	2,545	519
Total net revenues	4,643	3,681
Cost of revenues:
Cost of product revenues	686	1,119
Provision for excess and obsolete inventories	82	231
Cost of intellectual property and service revenues	119	161
Total cost of revenues	887	1,511
Gross profit	3,756	2,170
Operating expenses:
Research and development	3,781	4,336
Marketing and sales	975	1,642
General and administrative	1,784	2,132
Restructuring charges, net	254	0
Reversal of accrued royalties, net	(179)	(58)
Total operating expenses	6,615	8,052
Operating loss	(2,859)	(5,882)
Other income (expense):
Other expense	(20)	(101)
Interest:
Interest income	3	23
Interest expense	(58)	(9)
Interest (expense) income, net	(55)	14
Total other expense, net	(75)	(87)
Loss before income taxes	(2,934)	(5,969)
Income taxes	173	114
Net loss	$ (3,107)	$ (6,083)
Basic and diluted loss per common share:
Net loss per common share (in dollars per share)	$ (0.08)	$ (0.20)
Weighted average common shares outstanding - basic and diluted (in shares)	36,873	30,685