Common Stock Purchase Warrants (Details) (Warrant [Member], USD $)	6 Months Ended
	Jun. 30, 2012
Warrant [Member]
Summary of warrant activity
Balance outstanding, January 1, 2012, Number of Warrants	31,649,835
Balance outstanding, January 1, 2012, Weighted Average Exercise Price	$ 0.97
Balance outstanding, January 1, 2012, Weighted Average Remaining Contractual Life (in years)	2 years 9 months 18 days
Warrants issued, Number of Warrants	0
Warrants issued, Weighted Average Exercise Price	$ 0.00
Warrants issued, Weighted Average Remaining Contractual Life (in years)	0 years
Warrants exercised, Number of Warrants	(2,730)
Warrants exercised, Weighted Average Exercise Price	$ 0.28
Warrants exercised, Weighted Average Remaining Contractual Life (in years)	0 years
Warrants expired, Number of Warrants	(2,653,080)
Warrants expired, Weighted Average Exercise Price	$ 1.04
Warrants expired, Weighted Average Remaining Contractual Life (in years)	0 years
Warrants cancelled, Number of Warrants	0
Warrants cancelled, Weighted Average Exercise Price	$ 0
Warrants cancelled, Weighted Average Remaining Contractual Life (in years)	0 years
Balance outstanding, June 30, 2012, Number of Warrants	28,994,025
Balance outstanding, June 30, 2012, Weighted Average Exercise Price	$ 0.96
Balance outstanding, June 30, 2012, Weighted Average Remaining Contractual Life (in years)	2 years 6 months
Warrants exercisable at June 30, 2012, Number of Warrants	28,994,025
Warrants exercisable at June 30, 2012, Weighted Average Exercise Price	$ 0.96
Warrants exercisable at June 30, 2012, Weighted Average Remaining Contractual Life (in years)	2 years 6 months