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)

v3.5.0.2
Stockholders' Equity - Schedule of Share-based Compensation, Shares Outstanding under Stock Option Plans, by Exercise Price Range (Details)
 6 Months Ended
Jun. 30, 2016
$ / shares
shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding, Outstanding Number of Options 8,820,686
Options Exercisable, Weighted Exercise Average Remaining Life In Years 1 year 9 months 18 days
Options Exercisable, Exercisable Number of Options 6,116,281
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 541,723
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 3,775,637
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 2,500
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 1,771,421
Options Exercisable, Weighted Exercise Average Remaining Life In Years 0 years
Options Exercisable, Exercisable Number of Options 1,771,421
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 3 years 10 months 24 days
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 4 months 24 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 3 years 10 months 24 days
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