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Consolidated Statements of Stockholders Equity - USD ($)
Total
Common stock [Member]
Additional paid-in capital [Member]
Accumulated other comprehensive loss [Member]
Accumulated deficit [Member]
Beginning balance (in shares) at Dec. 31, 2017   6,047,161      
Beginning balance at Dec. 31, 2017 $ 13,292,782 $ 605 $ 25,541,210 $ (18,080) $ (12,230,953)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Stock-based compensation $ 18,547   18,547    
Issuance of common stock (in shares) 375,000 375,000      
Issuance of common stock $ 1,037,764 $ 37 1,037,727    
Deemed dividend from trigger of down round provision 0        
Net proceeds from issuance of common stock and warrants (in shares)   5,000,000      
Public offering costs 9,157,888 $ 500 9,157,388    
Net loss (11,247,787)       (11,247,787)
Foreign currency translation adjustments (41,231)     (41,231)  
Ending balance (in shares) at Jun. 30, 2018   11,422,161      
Ending balance at Jun. 30, 2018 12,217,963 $ 1,142 35,754,872 (59,311) (23,478,740)
Beginning balance (in shares) at Mar. 31, 2018   11,422,161      
Beginning balance at Mar. 31, 2018 15,820,356 $ 1,142 35,747,609 (31,826) (19,896,570)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Stock-based compensation 9,423   9,423    
Public offering costs $ (2,160)   (2,160)    
Issuance of common stock (in shares) 0        
Deemed dividend from trigger of down round provision $ 0        
Net loss (3,582,170)       (3,582,170)
Foreign currency translation adjustments (27,485)     (27,485)  
Ending balance (in shares) at Jun. 30, 2018   11,422,161      
Ending balance at Jun. 30, 2018 12,217,963 $ 1,142 35,754,872 (59,311) (23,478,740)
Beginning balance (in shares) at Dec. 31, 2018   11,422,161      
Beginning balance at Dec. 31, 2018 6,726,620 $ 1,143 35,791,972 (96,728) (28,969,767)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Stock-based compensation $ 209,319   209,319    
Issuance of common stock (in shares) 0 5,261,250      
Issuance of common stock $ 5,151,702 $ 525 5,151,177    
Deemed dividend from trigger of down round provision (789,594)   789,594   (789,594)
Net loss (7,004,290)       (7,004,290)
Foreign currency translation adjustments (296)     (296)  
Ending balance (in shares) at Jun. 30, 2019   16,683,411      
Ending balance at Jun. 30, 2019 5,083,055 $ 1,668 41,942,062 (97,024) (36,763,651)
Beginning balance (in shares) at Mar. 31, 2019   11,422,161      
Beginning balance at Mar. 31, 2019 3,780,369 $ 1,143 35,889,940 (89,107) (32,021,607)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Stock-based compensation $ 111,351   111,351    
Issuance of common stock (in shares) 0 5,261,250      
Issuance of common stock $ 5,151,702 $ 525 5,151,177    
Deemed dividend from trigger of down round provision (789,594)   789,594   (789,594)
Net loss (3,952,450)       (3,952,450)
Foreign currency translation adjustments (7,917)     (7,917)  
Ending balance (in shares) at Jun. 30, 2019   16,683,411      
Ending balance at Jun. 30, 2019 $ 5,083,055 $ 1,668 $ 41,942,062 $ (97,024) $ (36,763,651)