Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Schedule of Share-based Compensation, Shares Outstanding under Stock Option Plans, by Exercise Price Range (Details)

v3.4.0.3
Stockholders' Equity - Schedule of Share-based Compensation, Shares Outstanding under Stock Option Plans, by Exercise Price Range (Details)
 3 Months Ended
Mar. 31, 2016
$ / shares
shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding, Outstanding Number of Options 8,895,686
Options Exercisable, Weighted Exercise Average Remaining Life In Years 1 year 9 months 18 days
Options Exercisable, Exercisable Number of Options 5,539,304
Exercise Price Range 2.20 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding, Weighted Exercise Average Price | $ / shares $ 2.20
Options Outstanding, Outstanding Number of Options 2,166,890
Options Exercisable, Exercisable Number of Options
Exercise Price Range 2.48 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding, Weighted Exercise Average Price | $ / shares $ 2.48
Options Outstanding, Outstanding Number of Options 4,847,375
Options Exercisable, Exercisable Number of Options 3,667,883
Exercise Price Range 3.30 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding, Weighted Exercise Average Price | $ / shares $ 3.30
Options Outstanding, Outstanding Number of Options 10,000
Options Exercisable, Exercisable Number of Options
Exercise Price Range 3.50 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding, Weighted Exercise Average Price | $ / shares $ 3.50
Options Outstanding, Outstanding Number of Options 25,000
Options Exercisable, Exercisable Number of Options 25,000
Exercise Price Range 3.85 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding, Weighted Exercise Average Price | $ / shares $ 3.85
Options Outstanding, Outstanding Number of Options 1,846,421
Options Exercisable, Weighted Exercise Average Remaining Life In Years 3 months 18 days
Options Exercisable, Exercisable Number of Options 1,846,421
Exercise Price Range 2.20 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Exercisable, Weighted Exercise Average Remaining Life In Years 0 years
Exercise Price Range 2.48 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Exercisable, Weighted Exercise Average Remaining Life In Years 2 years 7 months 6 days
Exercise Price Range 3.30 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Exercisable, Weighted Exercise Average Remaining Life In Years 0 years
Exercise Price Range 3.50 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Exercisable, Weighted Exercise Average Remaining Life In Years 2 years 2 months 12 days