Quarterly report pursuant to Section 13 or 15(d)

Stock options and warrants (Schedule of Stock-based Compensation) (Details)

v2.4.0.8
Stock options and warrants (Schedule of Stock-based Compensation) (Details) (USD $)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]    
Stock options to employees and directors $ 402,839 $ 483,625
Stock options to consultants for APPY1 activities 182 597
Stock-based compensation 403,021 484,222
Selling, general and administrative expenses [Member]
   
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]    
Stock-based compensation 382,994 483,625
Research and development expenses [Member]
   
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]    
Stock-based compensation $ 20,027 $ 597