Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity - Summary of Changes in Shareholders' Equity (Details)

v3.19.3
Shareholders' Equity - Summary of Changes in Shareholders' Equity (Details) - USD ($)
 3 Months Ended 9 Months Ended
May 01, 2019
Feb. 01, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Sep. 30, 2019
Sep. 30, 2018
Shareholders Equity [Line Items]                    
Beginning balances     $ 24,422,900 $ 29,123,771 $ 20,881,983 $ 3,650,580 $ 4,315,236 $ 6,316,309 $ 20,881,983 $ 6,316,309
Compensation expense relating to option issuances     232,175 164,588 145,829 648,302 81,986 118,324    
Issuance of common stock - shelf takedown, net of expenses       (65,000) 11,415,676   1,510,327      
Issuance of common stock in exchange for services       6,001 $ 6,000 6,000        
Issuance of common stock in exchange for services, shares                  
Series C dividend             413,215 58,670
Conversion of Series A preferred stock to common stock                  
Issuance of restricted common stock             24,320      
Issuance of common stock, Series D preferred stock, and warrants, net of expenses           12,431,628        
Conversion of Series D preferred stock to common stock                  
Net loss     (3,836,549) (4,806,460) (3,325,717) (2,757,835) (2,281,289) (2,119,397) (11,968,726) (7,158,521)
Ending balances     20,818,526 24,422,900 29,123,771 13,978,675 3,650,580 4,315,236 20,818,526 13,978,675
Common Stock [Member]                    
Shareholders Equity [Line Items]                    
Beginning balances     $ 46,125 $ 46,112 $ 29,433 $ 6,103 $ 5,187 $ 4,928 $ 29,433 $ 4,928
Beginning balances, shares     46,124,803 46,112,303 29,433,135 6,102,635 5,186,635 4,928,335 29,433,135 4,928,335
Compensation expense relating to option issuances        
Issuance of common stock - shelf takedown, net of expenses       $ 16,667   $ 900      
Issuance of common stock - shelf takedown, net of expenses, shares         16,666,668   900,000      
Issuance of common stock in exchange for services       $ 13 $ 12 $ 12        
Issuance of common stock in exchange for services, shares 12,500 12,500   12,500 12,500 12,500        
Series C dividend                
Series C dividend, shares                
Conversion of Series A preferred stock to common stock               $ 259    
Conversion of Series A preferred stock to common stock               258,300    
Issuance of restricted common stock             $ 16      
Issuance of restricted common stock, shares             16,000      
Issuance of common stock, Series D preferred stock, and warrants, net of expenses           $ 4,436        
Issuance of common stock, Series D preferred stock, and warrants, net of expenses, shares           4,436,000        
Conversion of Series D preferred stock to common stock           $ 7,868        
Conversion of Series D preferred stock to common stock, shares           7,868,000        
Net loss        
Ending balances     $ 46,125 $ 46,125 $ 46,112 $ 18,419 $ 6,103 $ 5,187 $ 46,125 $ 18,419
Ending balances, shares     46,124,803 46,124,803 46,112,303 18,419,135 6,102,635 5,186,635 46,124,803 18,419,135
Preferred Stock [Member]                    
Shareholders Equity [Line Items]                    
Beginning balances     $ 6,513,396 $ 6,513,396 $ 6,100,182 $ 6,100,182 $ 6,100,182 $ 6,309,608 $ 6,100,182 $ 6,309,608
Beginning balances, shares     16,017,113.941 16,017,113.941 16,017,101.733 16,017,101.733 16,017,101.7330 18,600,100.000 16,017,101.733 18,600,100.000
Compensation expense relating to option issuances        
Issuance of common stock - shelf takedown, net of expenses              
Issuance of common stock - shelf takedown, net of expenses, shares                  
Issuance of common stock in exchange for services              
Issuance of common stock in exchange for services, shares                  
Series C dividend         $ 413,214     $ 58,670    
Series C dividend, shares         12.208     1.733    
Conversion of Series A preferred stock to common stock               $ (268,096)    
Conversion of Series A preferred stock to common stock               (2,583,000)    
Issuance of restricted common stock                  
Issuance of common stock, Series D preferred stock, and warrants, net of expenses           $ 4,464,107        
Issuance of common stock, Series D preferred stock, and warrants, net of expenses, shares           9,364,000        
Conversion of Series D preferred stock to common stock           $ (3,750,920)        
Conversion of Series D preferred stock to common stock, shares           (7,868,000)        
Net loss        
Ending balances     $ 6,513,396 $ 6,513,396 $ 6,513,396 $ 6,813,369 $ 6,100,182 $ 6,100,182 $ 6,513,396 $ 6,813,369
Ending balances, shares     16,017,113.941 16,017,113.941 16,017,113.941 17,513,101.733 16,017,101.733 16,017,101.7330 16,017,113.941 17,513,101.733
Additional Paid In Capital [Member]                    
Shareholders Equity [Line Items]                    
Beginning balances     $ 137,782,378 $ 137,676,802 $ 126,125,976 $ 103,404,448 $ 101,788,731 $ 101,402,570 $ 126,125,976 $ 101,402,570
Compensation expense relating to option issuances     232,175 164,588 145,829 648,302 81,986 118,324    
Issuance of common stock - shelf takedown, net of expenses       (65,000) 11,399,009   1,509,427      
Issuance of common stock in exchange for services       5,988 $ 5,988 5,988        
Issuance of common stock in exchange for services, shares                  
Series C dividend                
Series C dividend, shares                  
Conversion of Series A preferred stock to common stock               $ 267,837    
Issuance of restricted common stock             24,304      
Issuance of common stock, Series D preferred stock, and warrants, net of expenses           7,963,085        
Conversion of Series D preferred stock to common stock           3,743,052        
Net loss        
Ending balances     138,014,553 137,782,378 137,676,802 115,764,875 103,404,448 101,788,731 138,014,553 115,764,875
Accumulated Deficit [Member]                    
Shareholders Equity [Line Items]                    
Beginning balances     (119,918,999) (115,112,539) $ (111,373,608) (105,860,153) (103,578,864) (101,400,797) $ (111,373,608) (101,400,797)
Beginning balances, shares                
Compensation expense relating to option issuances        
Issuance of common stock - shelf takedown, net of expenses              
Issuance of common stock - shelf takedown, net of expenses, shares                  
Issuance of common stock in exchange for services              
Issuance of common stock in exchange for services, shares                  
Series C dividend         $ (413,214)     (58,670)    
Conversion of Series A preferred stock to common stock                  
Issuance of restricted common stock                  
Issuance of common stock, Series D preferred stock, and warrants, net of expenses                  
Conversion of Series D preferred stock to common stock                  
Net loss     (3,836,549) (4,806,460) (3,325,717) (2,757,835) (2,281,289) (2,119,397)    
Ending balances     $ (123,755,548) $ (119,918,999) $ (115,112,539) $ (108,617,988) $ (105,860,153) $ (103,578,864) $ (123,755,548) $ (108,617,988)