v3.19.3.a.u2
Condensed Statements of Changes in Stockholders' Equity - USD ($)
Series A Preferred Stock [Member]
Series B Preferred Stock [Member]
Series C Preferred Stock [Member]
Common Stock [Member]
Paid-in Capital [Member]
Accumulated Deficit [Member]
Other Comprehensive Loss [Member]
Total
Balance at Dec. 31, 2016 $ 1,162 $ 49,603,487 $ (45,467,576) $ 4,137,073
Balance, shares at Dec. 31, 2016 1,161,920        
Issuance of shares upon follow-on offering $ 5,150,980 $ 3,454 17,844,220 22,998,654
Issuance of shares upon follow-on offering, shares 9,180 3,453,987        
Commissions and offering costs of follow-on offering (2,038,471) (2,038,471)
Issuance of shares under common stock purchase agreement $ 314 1,996,862 1,997,176
Issuance of shares under common stock purchase agreement, shares 313,732        
Stock-based compensation 895,498 895,498
Conversion of series A preferred shares $ (22,444) $ 10 22,344 (90)
Conversion of series A preferred shares, shares (40) 10,000        
Net loss (7,863,858) (7,863,858)
Balance at Dec. 31, 2017 $ 5,128,536 $ 4,941 68,323,939 (53,331,434) 20,125,982
Balance, shares at Dec. 31, 2017 9,140 4,940,652        
Conversion of preferred shares into common stock $ (179,555) $ 80 179,475
Conversion of preferred shares into common stock, shares (320) 80,000        
Stock-based compensation 212,608 212,608
Net loss (2,012,690) (2,012,690)
Balance at Mar. 31, 2018 $ 4,948,981 $ 5,021 68,716,022 (55,344,124) 18,325,900
Balance, shares at Mar. 31, 2018 8,820 5,020,652        
Balance at Dec. 31, 2017 $ 5,128,536 $ 4,941 68,323,939 (53,331,434) 20,125,982
Balance, shares at Dec. 31, 2017 9,140 4,940,652        
Net loss               (10,243,605)
Balance at Sep. 30, 2018 $ 3,344,209 $ 5,735 70,665,970 (63,575,039) 10,440,875
Balance, shares at Sep. 30, 2018 5,960 5,734,639        
Balance at Dec. 31, 2017 $ 5,128,536 $ 4,941 68,323,939 (53,331,434) 20,125,982
Balance, shares at Dec. 31, 2017 9,140 4,940,652        
Stock-based compensation 645,823 645,823
Issuance of Series B preferred shares upon closing of private placement $ 4,570,848 792,037 5,362,885
Issuance of Series B preferred shares upon closing of private placement, shares 6,000        
Commissions and offering costs of private placement $ (390,449) (122,081) (512,530)
Commissions and offering costs of private placement, shares        
Deemed dividend of preferred stock $ (1,054,886) $ 1,880,000 (188,000) 637,114
Deemed dividend of preferred stock, shares (1,880) 1,880        
Conversion of Series A preferred shares into common stock $ (1,784,326) $ 795 1,783,531
Conversion of Series A preferred shares into common stock, shares (3,180) 795,000        
Conversion of Series B preferred shares into common stock $ (273,468) $ 302 273,166
Conversion of Series B preferred shares into common stock, shares (392) 301,923        
Unrealized gain on investment in marketable securities (923) (923)
Payout to stockholders for fractional shares (3,256) (3,256)
Net loss (16,868,711) (16,868,711)
Balance at Dec. 31, 2018 $ 2,289,324 $ 3,906,931 $ 1,880,000 $ 6,037 71,505,160 (70,200,145) (923) 9,386,384
Balance, shares at Dec. 31, 2018 4,080 5,608 1,880 6,036,562        
Balance at Mar. 31, 2018 $ 4,948,981 $ 5,021 68,716,022 (55,344,124) 18,325,900
Balance, shares at Mar. 31, 2018 8,820 5,020,652        
Conversion of preferred shares into common stock $ (706,998) $ 314 706,683
Conversion of preferred shares into common stock, shares (1,260) 315,000        
Stock-based compensation 178,074 178,074
Payout to stockholders for fractional shares (3,256) (3,256)
Net loss (3,584,652) (3,584,652)
Balance at Jun. 30, 2018 $ 4,241,983 $ 5,335 69,597,523 (58,928,776) 14,916,065
Balance, shares at Jun. 30, 2018 7,560 5,334,639        
Conversion of preferred shares into common stock $ (897,774) $ 400 897,374
Conversion of preferred shares into common stock, shares (1,600) 400,000        
Stock-based compensation 171,073 171,073
Net loss (4,646,263) (4,646,262)
Balance at Sep. 30, 2018 $ 3,344,209 $ 5,735 70,665,970 (63,575,039) 10,440,875
Balance, shares at Sep. 30, 2018 5,960 5,734,639        
Balance at Dec. 31, 2018 $ 2,289,324 $ 3,906,931 $ 1,880,000 $ 6,037 71,505,160 (70,200,145) (923) 9,386,384
Balance, shares at Dec. 31, 2018 4,080 5,608 1,880 6,036,562        
Stock-based compensation 146,491 146,491
Conversion of Series B preferred shares into common stock $ (1,816,732) $ 2,005 1,814,727
Conversion of Series B preferred shares into common stock, shares (2,608) 2,005,770        
Conversion of Series C preferred shares into common stock $ (1,640,000) $ 1,000 1,639,000
Conversion of Series C preferred shares into common stock, shares (1,640) 1,000,000        
Unrealized gain on investment in marketable securities (923) 2,434 1,511
Net loss (4,705,766) (4,705,766)
Balance at Mar. 31, 2019 $ 2,289,324 $ 2,090,199 $ 240,000 $ 9,042 75,105,378 (74,906,834) 1,511 4,828,620
Balance, shares at Mar. 31, 2019 4,080 3,000 240 9,042,332        
Balance at Dec. 31, 2018 $ 2,289,324 $ 3,906,931 $ 1,880,000 $ 6,037 71,505,160 (70,200,145) (923) 9,386,384
Balance, shares at Dec. 31, 2018 4,080 5,608 1,880 6,036,562        
Net loss               (9,688,127)
Balance at Sep. 30, 2019 $ 2,289,324 $ 1,288,956 $ 240,000 $ 9,927 76,122,975 (79,888,272) 62,910
Balance, shares at Sep. 30, 2019 4,080 1,850 240 9,926,956        
Balance at Mar. 31, 2019 $ 2,289,324 $ 2,090,199 $ 240,000 $ 9,042 75,105,378 (74,906,834) 1,511 4,828,620
Balance, shares at Mar. 31, 2019 4,080 3,000 240 9,042,332        
Stock-based compensation 122,703 122,703
Unrealized gain on investment in marketable securities $ 923 $ (1,511) $ (588)
Fractional shares adjustment (2)
Net loss $ (2,815,152) $ (2,815,152)
Balance at Jun. 30, 2019 $ 2,289,324 $ 2,090,199 $ 240,000 $ 9,042 75,228,081 (77,721,063) 2,135,583
Balance, shares at Jun. 30, 2019 4,080 3,000 240 9,042,330        
Stock-based compensation 94,536 94,536
Conversion of Series B preferred shares into common stock $ (801,243) $ 885 800,358
Conversion of Series B preferred shares into common stock, shares (1,150) 884,626        
Net loss (2,167,209) (2,167,209)
Balance at Sep. 30, 2019 $ 2,289,324 $ 1,288,956 $ 240,000 $ 9,927 $ 76,122,975 $ (79,888,272) $ 62,910
Balance, shares at Sep. 30, 2019 4,080 1,850 240 9,926,956