v3.19.3.a.u2
Basis of Presentation (Details Narrative) (10-K) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]                    
Net loss $ (2,167,209) $ (2,815,152) $ (4,705,766) $ (4,646,262) $ (3,584,652) $ (2,012,690) $ (9,688,127) $ (10,243,605) $ (16,868,711) $ (7,863,858)
Net cash used in operating activities             (12,851,824) $ (10,130,131) (13,332,927) (7,397,912)
Working capital                 9,300,000  
Accumulated deficit (79,888,272)           (79,888,272)   (70,200,145) (53,331,434)
Cash and cash equivalents $ 1,957,395           $ 1,957,395   7,812,259 $ 22,631,971
Investment in short-term marketable debt securities                 $ 7,000,000