Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY

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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Common Shares
Additional paid-in capital
Accumulated other comprehensive loss
Accumulated deficit
Series A Convertible Preferred Stock
Preferred Shares
Series B Convertible Preferred Stock
Preferred Shares
Series C Convertible Preferred Stock
Preferred Shares
Balance at beginning of period (shares) at Dec. 31, 2017   45,017,000       5,000    
Balance at beginning of period at Dec. 31, 2017 $ 11,522 $ 45 $ 136,484 $ (4,695) $ (120,312) $ 0    
Increase (Decrease) in Stockholders' Equity                
Net loss (26,754)       (26,754)      
Foreign currency translation adjustment 1,196     1,196        
Unrealized gain on investments 517     517        
Stock based compensation expense $ 4,943   4,943          
Issuance of common stock resulting from exercise of stock options (shares) 596,269 596,000            
Issuance of common stock resulting from exercise of stock options $ 986 $ 1 985          
Issuance of common stock resulting from exercise of warrants (shares)   157,000            
Issuance of common stock resulting from exercise of warrants 314   314          
Issuance of common stock net $3,374 in offering costs (shares)   6,325,000            
Issuance of common stock net $3,374 in offering costs 47,211 $ 6 47,205          
Preferred stock conversion (shares)   2,056,000       (2,000)    
Preferred stock conversion 0 $ 2 (2)          
Balance at end of period (shares) at Dec. 31, 2018   54,151,000       3,000    
Balance at end of period at Dec. 31, 2018 39,935 $ 54 189,929 (2,982) (147,066) $ 0    
Increase (Decrease) in Stockholders' Equity                
Net loss (25,469)       (25,469)      
Foreign currency translation adjustment 973     973        
Unrealized gain on investments 14     14        
Stock based compensation expense $ 5,374   5,374          
Issuance of common stock resulting from exercise of stock options (shares) 279,075 279,000            
Issuance of common stock resulting from exercise of stock options $ 553   $ 553          
Issuance of common stock resulting from purchase of employee stock purchase plan shares (shares) 113,112   113,000          
Issuance of common stock resulting from purchase of employee stock purchase plan shares $ 369   $ 369          
Issuance of common stock resulting from exercise of warrants (shares)   176,000            
Issuance of common stock resulting from exercise of warrants 246   246          
Issuance of common stock net $3,374 in offering costs (shares)   5,493,000           4,000
Issuance of common stock net $3,374 in offering costs 30,998 $ 6 30,992          
Preferred stock conversion (shares)   (5,000,000)         5,000  
Preferred stock conversion 0 $ (5) 5          
Balance at end of period (shares) at Dec. 31, 2019   55,212,000       3,000 5,000 4,000
Balance at end of period at Dec. 31, 2019 51,352 $ 55 $ 227,468 $ (1,995) (174,176) $ 0    
Increase (Decrease) in Stockholders' Equity                
Adoption of ASC 606, Revenue from Contracts with Customers $ (1,641)       $ (1,641)