Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating expenses:
Loss from discontinued operations	$ (421)	$ (2,028)
AssuredUVS [Member]
Loss from discontinued operations
Net revenue	20	146
Cost of goods sold	131	537
Gross profit	(111)	(391)
Operating expenses:
Research and development	0	745
Sales and marketing	0	56
General and administrative	320	178
Restructuring charge	(10)	657
Total operating expenses	310	1,636
Operating loss	(421)	(2,027)
Other income (expense), net	0	(1)
Loss from discontinued operations	$ (421)	$ (2,028)