CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net revenues:
Product revenues	$ 2,374	$ 4,016	$ 5,536	$ 9,827
Service revenues	1,451	3,037	1,970	5,453
Total net revenues	3,825	7,053	7,506	15,280
Cost of revenues:
Cost of product revenues	866	1,305	1,985	3,085
Provision for excess and obsolete inventories	220	0	451	160
Cost of service revenues	175	1,034	336	2,038
Total cost of revenues	1,261	2,339	2,772	5,283
Gross profit	2,564	4,714	4,734	9,997
Operating expenses:
Research and development	4,678	4,490	9,014	9,055
Marketing and sales	1,317	2,076	2,959	4,064
General and administrative	1,930	1,915	4,062	3,774
Restructuring charges, net	1,001	0	1,001	467
Reversal of accrued royalties, net	(442)	(825)	(500)	(1,575)
Total operating expenses	8,484	7,656	16,536	15,785
Operating loss	(5,920)	(2,942)	(11,802)	(5,788)
Other income (expense):
Other income (expense)	57	(8)	(44)	(13)
Interest:
Interest income	17	68	40	92
Interest expense	(32)	(68)	(41)	(193)
Interest expense, net	(15)	0	(1)	(101)
Total other income (expense), net	42	(8)	(45)	(114)
Loss before income taxes	(5,878)	(2,950)	(11,847)	(5,902)
Income taxes	119	49	233	246
Net loss	$ (5,997)	$ (2,999)	$ (12,080)	$ (6,148)
Basic and diluted loss per common share:
Net loss per common share (in dollars per share)	$ (0.19)	$ (0.11)	$ (0.39)	$ (0.24)
Weighted average common shares outstanding - basic and diluted (in shares)	31,617	26,853	31,151	25,263