Stock-Based Compensation (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock option/warrant expense, included in total operating expenses	$ 57	$ 42	$ 117	$ 85
Officer compensation [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock option/warrant expense, included in total operating expenses	16	6	32	14
Non-employee directors [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock option/warrant expense, included in total operating expenses	5	2	10	3
Sales, general and administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock option/warrant expense, included in total operating expenses	6	4	15	8
Research and development [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock option/warrant expense, included in total operating expenses	$ 30	$ 30	$ 60	$ 60