Stockholders' Equity (Details 4) - 2009 Equity Incentive Plans [Member] - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, beginning of year	7,673,262	6,708,978	4,688,978
Granted	800,000	1,314,284	2,020,000
Forfeited	(653,728)	(350,000)
Exercised
Outstanding, end of year	7,819,534	7,673,262	6,708,978
Exercisable, end of year	7,486,201	6,929,335	5,713,145
Available for future grants	8,341,271	1,487,543	3,090,478
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Option Price [Roll Forward]
Granted	$ 0.25
Forfeited
Exercised
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding, beginning of year	$ 0.55	$ 0.55	$ 0.61
Granted	0.25	0.40	$ 0.40
Forfeited	$ 1.74	$ 1.45
Exercised
Outstanding, end of year	$ 0.46	$ 0.55	$ 0.55
Exercisable, end of year	$ 0.46	$ 0.55	$ 0.55
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Weighted average remaining contractual life (years)	4 years	5 years	6 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Option Price [Roll Forward]
Outstanding, beginning of year	$ 0.21	$ 0.21	$ 0.21
Granted		0.33	0.22
Forfeited	0.25	0.31
Outstanding, end of year	0.21	0.21	0.21
Exercisable, end of year	$ 0.21	$ 0.21	$ 0.21
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Weighted average remaining contractual life (years)	10 years	10 years	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Option Price [Roll Forward]
Outstanding, beginning of year	$ 4.03	$ 4.03	$ 4.03
Granted		2.60	2.00
Forfeited	4.03	2.81
Outstanding, end of year	4.03	4.03	4.03
Exercisable, end of year	$ 4.03	$ 4.03	$ 4.03