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 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock options to employees and directors $ 213,988 $ 332,150 $ 943,061 $ 1,226,304
Stock options to consultants for APPY1 activities 86 100 425 1,293
Stock-based compensation 214,074 332,250 943,486 1,227,597
Selling, general and administrative expenses [Member]
       
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation 201,543 301,888 889,888 1,111,623
Research and development expenses [Member]
       
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock-based compensation $ 12,531 $ 30,362 $ 53,598 $ 115,974