Quarterly report pursuant to Section 13 or 15(d)

Stock Options and Warrants (Details 2)

v3.8.0.1
Stock Options and Warrants (Details 2) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Stock based compensation expense $ 135,000 $ 300,000 $ 789,000 $ 1,027,000
Research and development [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Stock based compensation expense 65,000 113,000 368,000 423,000
General and administrative [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]        
Stock based compensation expense $ 70,000 $ 187,000 $ 421,000 $ 604,000