Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY

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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands
Total
Common Shares
Additional paid-in capital
Accumulated other comprehensive loss
Accumulated deficit
Series A convertible preferred shares
Convertible preferred shares
Series B convertible preferred shares
Convertible preferred shares
Balance at beginning of period (shares) at Dec. 31, 2017   45,017       4,963 0
Balance at beginning of period at Dec. 31, 2017 $ 11,522 $ 45 $ 136,484 $ (4,695) $ (120,312) $ 0 $ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net loss (8,917)       (8,917)    
Foreign currency translation adjustment 519     519      
Unrealized gains/(losses) on investments 1,602     1,602      
Stock based compensation expense 2,364   2,364        
Issuance of common stock resulting from exercise of stock options (shares)   519          
Issuance of common stock resulting from exercise of stock options 839 $ 1 838        
Issuance of common stock resulting from exercise of warrants (shares)   91          
Issuance of common stock resulting from exercise of warrants 181   181        
Issuance of common stock, net of offering costs (shares)   6,325          
Issuance of common stock, net of offering costs 47,207 $ 6 47,201        
Preferred stock conversion (shares)   2,056       (2,056)  
Preferred stock conversion 0 $ 2 (2)        
Balance at end of period (shares) at Jun. 30, 2018   54,008       2,907 0
Balance at end of period at Jun. 30, 2018 55,317 $ 54 187,066 (2,574) (129,229) $ 0 $ 0
Balance at beginning of period (shares) at Mar. 31, 2018   53,974       2,907 0
Balance at beginning of period at Mar. 31, 2018 50,692 $ 54 185,638 (5,974) (129,026) $ 0 $ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net loss (203)       (203)    
Foreign currency translation adjustment 1,266     1,266      
Unrealized gains/(losses) on investments 2,134     2,134      
Stock based compensation expense 1,360   1,360        
Issuance of common stock resulting from exercise of stock options (shares)   6          
Issuance of common stock resulting from exercise of stock options 13 $ 0 13        
Issuance of common stock resulting from exercise of warrants (shares)   28          
Issuance of common stock resulting from exercise of warrants 55   55        
Balance at end of period (shares) at Jun. 30, 2018   54,008       2,907 0
Balance at end of period at Jun. 30, 2018 55,317 $ 54 187,066 (2,574) (129,229) $ 0 $ 0
Balance at beginning of period (shares) at Dec. 31, 2018   54,151       2,907 0
Balance at beginning of period at Dec. 31, 2018 39,935 $ 54 189,929 (2,982) (147,066) $ 0 $ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net loss (22,106)       (22,106)    
Foreign currency translation adjustment 272     272      
Unrealized gains/(losses) on investments 3     3      
Stock based compensation expense 2,742   2,742        
Issuance of common stock resulting from exercise of stock options (shares)   50          
Issuance of common stock resulting from exercise of stock options 97 $ 0 97        
Stock Issued During Period, Shares, Employee Stock Purchase Plans   58          
Stock Issued During Period, Value, Employee Stock Purchase Plan 178   178        
Issuance of common stock resulting from exercise of warrants (shares)   3          
Issuance of common stock resulting from exercise of warrants 5   5        
Preferred stock conversion (shares)   (5,000)         5,000
Preferred stock conversion 0 $ (5) 5        
Balance at end of period (shares) at Jun. 30, 2019   49,262       2,907 5,000
Balance at end of period at Jun. 30, 2019 19,485 $ 49 192,956 (2,707) (170,813) $ 0 $ 0
Balance at beginning of period (shares) at Mar. 31, 2019   49,151       2,907 5,000
Balance at beginning of period at Mar. 31, 2019 30,162 $ 49 191,224 (2,056) (159,055) $ 0 $ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net loss (11,758)       (11,758)    
Foreign currency translation adjustment (414)     (414)      
Unrealized gains/(losses) on investments (237)     (237)      
Stock based compensation expense 1,452   1,452        
Issuance of common stock resulting from exercise of stock options (shares)   50          
Issuance of common stock resulting from exercise of stock options 97 $ 0 97        
Stock Issued During Period, Shares, Employee Stock Purchase Plans   58          
Stock Issued During Period, Value, Employee Stock Purchase Plan 178   178        
Issuance of common stock resulting from exercise of warrants (shares)   3          
Issuance of common stock resulting from exercise of warrants 5   5        
Balance at end of period (shares) at Jun. 30, 2019   49,262       2,907 5,000
Balance at end of period at Jun. 30, 2019 $ 19,485 $ 49 $ 192,956 $ (2,707) $ (170,813) $ 0 $ 0