Equity Incentive Plans (Details 3) (USD $)	9 Months Ended
	Sep. 30, 2012
Number Outstanding (in shares)	13,100,508
Number Of Option Exercisable (in shares)	10,068,540
Exercise Price Range Zero Point Zero One [Member]
Range of Exercise Prices Upper Limit	$ 0.01
Number Outstanding (in shares)	643,465
Options Ouststanding, Weighted-Average Remaining Contractual Life (Years)	7 months 6 days
Options Ouststanding, Weighted-Average Exercise Price (in dollars per share)	$ 0.01
Number Of Option Exercisable (in shares)	643,465
Option Exercisable, Weighted- Average Exercise Price (in dollars per share)	$ 0.01
Exercise Price Range Zero Point Two Nine To Zero Point Four Five [Member]
Range Of Exercise Prices Lower Limit	$ 0.29
Range of Exercise Prices Upper Limit	$ 0.45
Number Outstanding (in shares)	9,557,043
Options Ouststanding, Weighted-Average Remaining Contractual Life (Years)	5 years 6 months
Options Ouststanding, Weighted-Average Exercise Price (in dollars per share)	$ 0.32
Number Of Option Exercisable (in shares)	7,225,075
Option Exercisable, Weighted- Average Exercise Price (in dollars per share)	$ 0.31
Exercise Price Range Zero Point Six Zero To Zero Point Seven Zero [Member]
Range Of Exercise Prices Lower Limit	$ 0.60
Range of Exercise Prices Upper Limit	$ 0.70
Number Outstanding (in shares)	2,900,000
Options Ouststanding, Weighted-Average Remaining Contractual Life (Years)	6 years 1 month 6 days
Options Ouststanding, Weighted-Average Exercise Price (in dollars per share)	$ 0.68
Number Of Option Exercisable (in shares)	2,200,000
Option Exercisable, Weighted- Average Exercise Price (in dollars per share)	$ 0.68