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
Cumulative Effect, Period of Adoption, Adjustment
Preferred shares
Common shares
Additional paid-in capital
Accumulated other comprehensive loss
Accumulated deficit
Accumulated deficit
Cumulative Effect, Period of Adoption, Adjustment
Balance at beginning of period (shares) at Dec. 31, 2018     3 54,151        
Balance at beginning of period at Dec. 31, 2018 $ 39,935 $ (1,641) $ 0 $ 54 $ 189,929 $ (2,982) $ (147,066) $ (1,641)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net loss (24,698) [1]           (24,698)  
Foreign currency translation adjustment 1,908         1,908    
Unrealized gain (loss) on investment 377         377    
Stock based compensation expense 4,260       4,260      
Issuance of common stock resulting from exercise of stock options 218       218      
Issuance of common stock resulting from exercise of stock options (in shares)       111        
Issuance of common stock resulting from purchase of employee stock purchase plan shares 178       178      
Issuance of common stock resulting from purchase of employee stock purchase plan shares (in shares)       58        
Issuance of common stock resulting from exercise of warrants 105       105      
Issuance of common stock resulting from exercise of warrants (in shares)       73        
Preferred stock conversion (shares)     5 (5,000)        
Preferred stock conversion 0     $ (5) 5      
Balance at end of period (shares) at Sep. 30, 2019     8 49,393        
Balance at end of period at Sep. 30, 2019 20,642   $ 0 $ 49 194,695 (697) (173,405)  
Balance at beginning of period (shares) at Jun. 30, 2019     8 49,262        
Balance at beginning of period at Jun. 30, 2019 19,485   $ 0 $ 49 192,956 (2,707) (170,813)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net loss (2,592)           (2,592)  
Foreign currency translation adjustment 1,636         1,636    
Unrealized gain (loss) on investment 374         374    
Stock based compensation expense 1,518       1,518      
Issuance of common stock resulting from exercise of stock options 121       121      
Issuance of common stock resulting from exercise of stock options (in shares)       61        
Issuance of common stock resulting from exercise of warrants 100       100      
Issuance of common stock resulting from exercise of warrants (in shares)       70        
Balance at end of period (shares) at Sep. 30, 2019     8 49,393        
Balance at end of period at Sep. 30, 2019 20,642   $ 0 $ 49 194,695 (697) (173,405)  
Balance at beginning of period (shares) at Dec. 31, 2019     11 55,212        
Balance at beginning of period at Dec. 31, 2019 51,352   $ 0 $ 55 227,468 (1,995) (174,176)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net loss (22,830)           (22,830)  
Foreign currency translation adjustment 1,462         1,462    
Unrealized gain (loss) on investment (249)         (249)    
Stock based compensation expense 3,916       3,916      
Issuance of common stock resulting from exercise of stock options 271       271      
Issuance of common stock resulting from exercise of stock options (in shares)       139        
Issuance of common stock resulting from purchase of employee stock purchase plan shares 145       145      
Issuance of common stock resulting from purchase of employee stock purchase plan shares (in shares)       47        
Issuance of common stock pursuant to at the market offering program, net of $0.4 million in offering costs 9,624     $ 4 9,620      
Issuance of common stock pursuant to at the market sales, net of $0.4 million in offering costs (in shares)       3,571        
Preferred stock conversion (shares)     3 (3,000)        
Preferred stock conversion 0     $ (3) 3      
Balance at end of period (shares) at Sep. 30, 2020     14 55,971        
Balance at end of period at Sep. 30, 2020 43,691   $ 0 $ 56 241,423 (782) (197,006)  
Balance at beginning of period (shares) at Jun. 30, 2020     14 52,399        
Balance at beginning of period at Jun. 30, 2020 46,672   $ 0 $ 52 230,407 (1,064) (182,723)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net loss (14,283)           (14,283)  
Foreign currency translation adjustment 632         632    
Unrealized gain (loss) on investment (350)         (350)    
Stock based compensation expense 1,396       1,396      
Issuance of common stock pursuant to at the market offering program, net of $0.4 million in offering costs 9,624     $ 4 9,620      
Issuance of common stock pursuant to at the market sales, net of $0.4 million in offering costs (in shares)       3,571        
Balance at end of period (shares) at Sep. 30, 2020     14 55,971        
Balance at end of period at Sep. 30, 2020 $ 43,691   $ 0 $ 56 $ 241,423 $ (782) $ (197,006)  
[1] (1) Restated to conform to ASC 842. See accompanying Note 2.