CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net revenues:
Product revenues	$ 2,514	$ 2,374	$ 4,612	$ 5,536
Intellectual property and service revenues	323	1,451	2,868	1,970
Total net revenues	2,837	3,825	7,480	7,506
Cost of revenues:
Cost of product revenues	438	866	1,124	1,985
Provision for excess and obsolete inventories	66	220	148	451
Cost of intellectual property and service revenues	271	175	390	336
Total cost of revenues	775	1,261	1,662	2,772
Gross profit	2,062	2,564	5,818	4,734
Operating expenses:
Research and development	2,994	4,678	6,775	9,014
Marketing and sales	902	1,317	1,877	2,959
General and administrative	1,747	1,930	3,531	4,062
Restructuring charges, net	665	1,001	919	1,001
Reversal of accrued royalties, net	(433)	(442)	(612)	(500)
Total operating expenses	5,875	8,484	12,490	16,536
Operating loss	(3,813)	(5,920)	(6,672)	(11,802)
Other (expense) income:
Other (expense) income	(9)	57	(29)	(44)
Change in fair value of derivative liability	246	0	246	0
Interest:
Interest income	9	17	12	40
Interest expense	(28)	(32)	(86)	(41)
Interest expense, net	(19)	(15)	(74)	(1)
Total other (expense) income, net	218	42	143	(45)
Loss before income taxes	(3,595)	(5,878)	(6,529)	(11,847)
Income taxes	192	119	365	233
Net loss	$ (3,787)	$ (5,997)	$ (6,894)	$ (12,080)
Basic and diluted loss per common share:
Net loss per common share (in dollars per share)	$ (0.08)	$ (0.19)	$ (0.17)	$ (0.39)
Weighted average common shares outstanding - basic and diluted (in shares)	45,961	31,617	41,417	31,151