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Consolidated Statements of Stockholders' Equity (Deficit) - USD ($)
$ in Thousands
Total
April 2018 Public Offering
November 2018 Public Offering
Common Stock $0.001 par value
Common Stock $0.001 par value
November 2018 Public Offering
Common Stock
Common Stock
April 2018 Public Offering
Additional Paid-In Capital
Additional Paid-In Capital
November 2018 Public Offering
Accumulated Deficit
Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2016 $ (3,444)         $ 30,897   $ 5,732   $ (38,345) $ (1,728)
Beginning Balance, Shares at Dec. 31, 2016           16,926,120          
Proceeds from the issuance of common stock and accompanying warrants in public offering 9,187         $ 9,187          
Proceeds from the issuance of common stock and accompanying warrants in public offering, Shares           1,311,000          
Issuance of common stock and warrants in private placement 11,691         $ 11,691          
Issuance of common stock and warrants in private placement, Shares           1,446,016          
Fair value of warrants issued in connection with the December 2017 financing classified as derivative financial instruments (3,017)         $ (3,017)          
Share issuance costs (1,321)         (1,321)          
Stock-based compensation expense 1,719             1,719      
Proceeds from the exercise of stock options and warrants 2,588         $ 2,588          
Proceeds from the exercise of stock options and warrants, Shares           492,826          
Settlement of vested restricted stock units, net of taxes, Shares           2,264          
Reclassification of exercised compensation stock options and warrants from additional paid-in capital           $ 849   (849)      
Reclassification of liability classified warrants upon exercise $ 1,356         1,356          
Proceeds from exercise of stock options 173,500                    
Net loss $ (28,024)                 (28,024)  
Foreign currency translation adjustments 1,775                   1,775
Ending Balance at Dec. 31, 2017 (7,490)         $ 52,230   6,602   (66,369) 47
Ending Balance, Shares at Dec. 31, 2017           20,178,226          
Proceeds from the issuance of common stock and accompanying warrants in public offering   $ 18,400 $ 20,126   $ 3   $ 18,400   $ 20,123    
Proceeds from the issuance of common stock and accompanying warrants in public offering, Shares         2,439,394   2,463,185        
Fair value of liability-classified warrants issued in connection with April 2018 public offering (7,372)         $ (7,372)          
Share issuance costs   $ (1,273) (1,867)       $ (1,273)   (1,867)    
Stock-based compensation expense 1,047   $ 849         1,047 $ 849    
Proceeds from the exercise of stock options and warrants 4,637         $ 4,637          
Proceeds from the exercise of stock options and warrants, Shares           736,130          
Settlement of vested restricted stock units, net of taxes (2)             (2)      
Settlement of vested restricted stock units, net of taxes, Shares           705          
Reclassification of exercised compensation stock options and warrants from additional paid-in capital           $ 110   (110)      
Reclassification of liability classified warrants upon exercise 3,748         3,748          
Reclassification of April 2016 compensation options and warrants from additional paid-in capital to derivative financial instruments due to change in functional currency (1,586)             (1,586)      
Reclassification of USD denominated warrants from derivative financial instruments to additional paid-in capital due to change in functional currency 2,478             2,478      
Reclassification of equity-classified stock options to stock-based compensation liability due to change in functional currency (4,182)             (4,182)      
Reclassification from stock-based compensation liability to common stock as a result of exercise of stock options 32         32          
Reclassification of non-employee options recorded as derivative financial instruments due to modification of options 1,206             1,206      
Reclassification of stock-based compensation due to modification of options 10,338             10,338      
Reclassification upon change in corporate domicile       $ 23   $ (70,512)   70,489      
Reclassification upon change in corporate domicile, shares       23,378,246   (23,378,246)          
Proceeds from exercise of stock options $ 26             26      
Proceeds from exercise of stock options 98,500     10,220              
Net loss $ (28,623)                 (28,623)  
Foreign currency translation adjustments (638)                   (638)
Ending Balance at Dec. 31, 2018 $ 9,854     $ 26       $ 105,411   $ (94,992) $ (591)
Ending Balance, Shares at Dec. 31, 2018       25,827,860