Stockholders' Equity (Option and Warrant Rollforwards) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Stock Option Plan - 1990
Number of Options
Outstanding January 1	200,000	262,000	262,000
Granted	0	0	0
Forfeited	(200,000)	(62,000)	0
Exercised	0	0	0
Outstanding December 31	0	200,000	262,000	262,000
Exercisable, Shares	0	200,000	262,000
Remaining Contractual Life	0 years	0 years 9 months 29 days	2 years 10 months 10 days
Exercised in current and prior years	(27,215)	(27,215)	(27,215)
Available for future grants	0	0	0
Weighted Average Exercise Price
Outstanding January 1	$ 2.75	$ 3.05	$ 3.05
Granted, Weighted Average Exercise Price	$ 0.00	$ 0.00	$ 0.00
Canceled, Weighted Average Exercise Price	$ 2.75	$ 4.03	$ 0.00
Exercised, Weighted Average Exercise Price	$ 0.00	$ 0.00	$ 0.00
Outstanding December 31	$ 0.00	$ 2.75	$ 3.05	$ 3.05
Exercisable, Weighted Average Exercise Price	$ 0.00	$ 2.75	$ 3.05
Option Price
Option Price, Lower Limit		$ 2.75	$ 2.75	$ 2.75
Option Price, Upper Limit		$ 4.03	$ 4.03	$ 4.03
Equity Plan
Number of Options
Outstanding January 1	6,630,934	6,640,934	6,640,934
Granted	0	0	0
Forfeited	(150,000)	(10,000)	0
Exercised	0	0	0
Outstanding December 31	6,480,934	6,630,934	6,640,934	6,640,934
Exercisable, Shares	6,480,934	6,630,934	6,625,934
Available for future grants	170,019	10,019	10,019
Weighted Average Exercise Price
Outstanding January 1	$ 2.66	$ 2.66	$ 2.66
Granted, Weighted Average Exercise Price	$ 0.00	$ 0.00	$ 0.00
Canceled, Weighted Average Exercise Price	$ 2.00	$ 1.30	$ 0.00
Exercised, Weighted Average Exercise Price	$ 0.00	$ 0.00	$ 0.00
Outstanding December 31	$ 2.68	$ 2.66	$ 2.66	$ 2.66
Exercisable, Weighted Average Exercise Price	$ 2.68	$ 2.66	$ 2.66
Option Price
Option Price, Lower Limit	$ 1.30	$ 1.30	$ 1.30	$ 1.30
Option Price, Upper Limit	$ 6.00	$ 6.00	$ 6.00	$ 6.00
Equity Incentive Plan - 2007
Number of Options
Outstanding January 1	1,550,000	1,550,000	1,550,000
Granted	0	0	0
Forfeited	0	0	0
Exercised	0	0	0
Outstanding December 31	1,550,000	1,550,000	1,550,000	1,550,000
Exercisable, Shares	1,550,000	1,550,000	1,550,000
Remaining Contractual Life	4 years 9 months 22 days	5 years 9 months 22 days	6 years 9 months 22 days
Available for future grants	19,626	19,626	19,626
Weighted Average Exercise Price
Outstanding January 1	$ 2.17	$ 2.17	$ 2.17
Granted, Weighted Average Exercise Price	$ 0.00	$ 0.00	$ 0.00
Canceled, Weighted Average Exercise Price	$ 0.00	$ 0.00	$ 0.00
Exercised, Weighted Average Exercise Price	$ 0.00	$ 0.00	$ 0.00
Outstanding December 31	$ 2.17	$ 2.17	$ 2.17	$ 2.17
Exercisable, Weighted Average Exercise Price	$ 2.17	$ 2.17	$ 2.17
Option Price
Option Price, Lower Limit	$ 0.72	$ 0.72	$ 0.72	$ 0.72
Option Price, Upper Limit	$ 3.05	$ 3.05	$ 3.05	$ 3.05
Equity Incentive Plan - 2009
Number of Options
Outstanding January 1	4,688,978	3,189,978	1,879,978
Granted	2,020,000	1,499,000	1,310,000
Forfeited	0	0	0
Exercised	0	0	0
Outstanding December 31	6,708,978	4,688,978	3,189,978	1,879,978
Exercisable, Shares	5,713,145	3,962,183	2,856,645
Remaining Contractual Life	8 years 2 months 15 days	7 years 8 months 1 day	6 years 9 months 22 days
Available for future grants	3,090,478	6,907,247	9,765,847
Weighted Average Exercise Price
Outstanding January 1	$ 0.61	$ 0.70	$ 0.92
Granted, Weighted Average Exercise Price	$ 0.40	$ 0.42	$ 0.38
Canceled, Weighted Average Exercise Price	$ 0.00	$ 0.00	$ 0.00
Exercised, Weighted Average Exercise Price	$ 0.00	$ 0.00	$ 0.00
Outstanding December 31	$ 0.55	$ 0.61	$ 0.70	$ 0.92
Exercisable, Weighted Average Exercise Price	$ 0.55	$ 0.61	$ 1.57
Option Price
Option Price, Lower Limit	$ 0.21	$ 0.21	$ 0.21	$ 0.52
Option Price, Upper Limit	$ 4.03	$ 4.03	$ 2.81	$ 2.81
Warrant
Number of Options
Outstanding January 1	11,128,246	10,978,246	10,983,246
Granted	2,100,000	150,000	0
Forfeited	0	0	(5,000)
Exercised	0	0	0
Outstanding December 31	13,228,246	11,128,246	10,978,246	10,983,246
Exercisable, Shares	11,328,246	11,128,246	10,978,246
Remaining Contractual Life		2 years	2 years 10 months 24 days
Weighted Average Exercise Price
Outstanding January 1	$ 1.44	$ 1.55	$ 1.61
Granted, Weighted Average Exercise Price	$ 0.33	$ 1.30	$ 0.00
Canceled, Weighted Average Exercise Price	$ 0.00	$ 0.00	$ 3.60
Exercised, Weighted Average Exercise Price	$ 0.00	$ 0.00	$ 0.00
Outstanding December 31	$ 1.26	$ 1.44	$ 1.55	$ 1.61
Exercisable, Weighted Average Exercise Price	$ 1.42	$ 1.44	$ 1.55
Option Price
Option Price, Lower Limit	$ 0.25	$ 0.51	$ 0.51	$ 0.51
Option Price, Upper Limit	$ 2.00	$ 2.00	$ 1.65	$ 3.60
Maximum | Stock Option Plan - 1990
Weighted Average Exercise Price
Exercisable, Weighted Average Exercise Price			$ 4.03
Maximum | Equity Plan
Number of Options
Remaining Contractual Life	3 years	4 years	5 years
Weighted Average Exercise Price
Exercisable, Weighted Average Exercise Price	$ 6.0	$ 6.0	$ 6.0
Maximum | Equity Incentive Plan - 2007
Weighted Average Exercise Price
Exercisable, Weighted Average Exercise Price	$ 3.1	$ 3.1	$ 3.1
Maximum | Equity Incentive Plan - 2009
Weighted Average Exercise Price
Granted, Weighted Average Exercise Price	$ 2.00	$ 4.03	$ 0.55
Exercisable, Weighted Average Exercise Price	$ 4.03	$ 4.03	$ 2.81
Maximum | Warrant
Weighted Average Exercise Price
Granted, Weighted Average Exercise Price	$ 0.50	$ 2.00
Exercisable, Weighted Average Exercise Price	$ 2.00	$ 2.00	$ 1.65
Option Price
Years exercisable	Jan. 01, 2023	Jan. 01, 2022	Dec. 31, 2019
Minimum | Stock Option Plan - 1990
Weighted Average Exercise Price
Exercisable, Weighted Average Exercise Price		$ 2.75	$ 2.75
Minimum | Equity Plan
Number of Options
Remaining Contractual Life	2 years	3 years	4 years
Weighted Average Exercise Price
Exercisable, Weighted Average Exercise Price	$ 1.3	$ 1.3	$ 1.3
Minimum | Equity Incentive Plan - 2007
Weighted Average Exercise Price
Exercisable, Weighted Average Exercise Price	$ 0.7	$ 0.7	$ 0.7
Minimum | Equity Incentive Plan - 2009
Weighted Average Exercise Price
Granted, Weighted Average Exercise Price	$ 0.22	$ 0.29	$ 0.21
Exercisable, Weighted Average Exercise Price	$ 0.2	$ 0.2	$ 0.2
Minimum | Warrant
Weighted Average Exercise Price
Granted, Weighted Average Exercise Price	$ 0.25	$ 0.89
Exercisable, Weighted Average Exercise Price	$ 0.5	$ 0.5	$ 0.5
Option Price
Years exercisable	Jan. 01, 2014	Jan. 01, 2013	Jan. 01, 2012
Weighted Average
Number of Options
Exercisable, Shares	4,120,000	1,499,000	1,310,000
Weighted Average | Warrant
Number of Options
Exercisable, Shares	2,100,000