Stock-Based Compensation (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 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	$ 49	$ 174	$ 135
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	11	48	25
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	3	15	6
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	5	21	14
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	$ 90	$ 90