Quarterly report pursuant to Section 13 or 15(d)

Consolidated Statements Of Redeemable Preferred Stock and Stockholders' (Deficit) Equity (Unaudited)

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Consolidated Statements Of Redeemable Preferred Stock and Stockholders' (Deficit) Equity (Unaudited) - USD ($)
$ in Thousands
Total
Redeemable Preferred Stock
Additional Paid-in Capital
Additional Paid-in Capital
Series E Convertible Preferred Stock
Common Stock
Accumulated Other Comprehensive Loss
Accumulated Deficit
Beginning balance at Dec. 31, 2018     $ 228,429   $ 21 $ (670) $ (216,692)
Stockholders' equity:              
Issuance of common stock         1    
Ending balance at Jun. 30, 2019 $ 3,792   229,972   22 (711) (225,491)
Stockholders' equity:              
Issuance of common stock upon exercise of options     3        
Settlement of liability awards     209        
Stock-based compensation expense     1,122        
Other comprehensive loss           (41)  
Net loss (8,799)           (8,799)
Warrants issued in connection with debt instruments     209        
Beginning balance at Mar. 31, 2019     229,268   21 (725) (221,592)
Stockholders' equity:              
Issuance of common stock         1    
Ending balance at Jun. 30, 2019 3,792   229,972   22 (711) (225,491)
Stockholders' equity:              
Settlement of liability awards     7        
Stock-based compensation expense     488        
Other comprehensive loss           14  
Net loss (3,899)           (3,899)
Warrants issued in connection with debt instruments     209        
Total redeemable preferred stock, beginning balance at Dec. 31, 2019 3,965 $ 3,965          
Conversion of redeemable preferred stock   (3,965)          
Beginning balance at Dec. 31, 2019 377   235,595   31 (701) (234,547)
Stockholders' equity:              
Issuance of common stock 3,881       19    
Ending balance at Jun. 30, 2020 1,309   247,155   50 (645) (245,251)
Stockholders' equity:              
Sale of common stock     3,861        
Sale of common stock warrants     3,031        
Issuance of common stock upon conversion of participating convertible preferred stock, value       $ 3,965      
Settlement of liability awards     151        
Stock offering costs     (863)        
Stock-based compensation expense     1,348        
Other comprehensive loss           56  
Net loss (10,704)           (10,704)
Warrants issued in connection with debt instruments     67        
Total redeemable preferred stock, beginning balance at Mar. 31, 2020   3,965          
Conversion of redeemable preferred stock   $ (3,965)          
Beginning balance at Mar. 31, 2020     236,386   31 (719) (240,554)
Stockholders' equity:              
Issuance of common stock         19    
Ending balance at Jun. 30, 2020 1,309   247,155   $ 50 (645) (245,251)
Stockholders' equity:              
Sale of common stock     3,861        
Sale of common stock warrants     3,031        
Issuance of common stock upon conversion of participating convertible preferred stock, value       $ 3,965      
Stock offering costs     (863)        
Stock-based compensation expense     708        
Other comprehensive loss           $ 74  
Net loss $ (4,697)           $ (4,697)
Warrants issued in connection with debt instruments     $ 67