Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation (Details Narrative)

v3.19.3
Stock-based Compensation (Details Narrative) - USD ($)
9 Months Ended 12 Months Ended
May 08, 2014
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Share-based payment award increase of shares offering date January 1, 2015      
Share-based payment award, percentage of outstanding stock maximum 4.00%     4.00%
Unrecognized share-based compensation   $ 122,000    
Share-based compensation weighted average period   6 months    
Vesting description   All outstanding options expire ten years from date of grant. Options granted to employees prior to 2018 vest in equal monthly installments over three years. Beginning in 2018, options granted to employees vest over four years, with 25% of the shares vesting on the first annual anniversary of grant and the remaining shares vesting in 36 equal monthly installments over the following 3 years. A portion of options granted to consultants vests over four years, with the remaining vesting being based upon the achievement of certain performance milestones, which are tied to either financing or drug development initiatives.    
Number of restricted stock awards granted   415,178 713,266  
General and administrative expense   $ 238,000 $ 485,000  
Unrecognized share-based compensation, shares   200,000    
Stock Options [Member]        
Number of option vested   11,313,021    
Option vested price per share   $ 1.16    
Option intrinsic value   $ 600,000    
Unrecognized share-based compensation   $ 3,900,000    
Share-based compensation weighted average period   2 years 9 months 18 days    
Stock options expire term   10 years    
Employee [Member]        
Stock option shares vesting percentage   25.00%    
2013 Equity Compensation Plan [Member]        
Option granted description   Granted at prices not less than 100% of the fair value    
Option term   The term of the options is no longer than ten years.    
Number of common stock issued under plan   22,421,644    
2013 Equity Compensation Plan [Member] | Minimum [Member]        
Option vested period   3 years    
2013 Equity Compensation Plan [Member] | Maximum [Member]        
Option vested period   4 years