Annual report pursuant to Section 13 and 15(d)

Consolidated Statements Stockholders' Equity

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Consolidated Statements Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Income (Loss)
Accumulated Deficit
Beginning balance (shares) at Dec. 31, 2016   41,255      
Beginning balance at Dec. 31, 2016 $ 19,099 $ 4 $ 311,164 $ 0 $ (292,069)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Exercise of stock options (shares) 86 86      
Exercise of stock options $ 266   266    
Release of stock awards (shares)   1,096      
Employee stock-based compensation 7,048   7,048    
Non-employee stock-based compensation 43   43    
Taxes paid related to net share settlement of equity awards (shares)   (397)      
Taxes paid related to net share settlement of equity awards (1,670)   (1,670)    
Issuance of common stock, net of issuance costs (shares)   6,325      
Issuance of common stock, net of issuance costs 23,229 $ 1 23,228    
Total comprehensive loss (23,468)     (472) (22,996)
Net Loss (22,996)        
Ending balance (shares) at Dec. 31, 2017   48,365      
Ending balance at Dec. 31, 2017 $ 24,547 $ 5 340,079 (472) (315,065)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Exercise of stock options (shares) 772 856      
Exercise of stock options $ 4,680   4,680    
Release of stock awards (shares)   832      
Employee stock-based compensation 7,865   7,865    
Non-employee stock-based compensation 24   24    
Taxes paid related to net share settlement of equity awards (shares)   (301)      
Taxes paid related to net share settlement of equity awards (3,190)   (3,190)    
Issuance of common stock, net of issuance costs (shares)   4,313      
Issuance of common stock, net of issuance costs 37,317   37,317    
Total comprehensive loss (10,878)        
Net Loss (10,878)       (10,878)
Ending balance (shares) at Dec. 31, 2018   54,065      
Ending balance at Dec. 31, 2018 $ 56,306 $ 5 386,775 0 (330,474)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Exercise of stock options (shares) 1,045 1,466      
Exercise of stock options $ 7,099   7,099    
Release of stock awards (shares)   449      
Employee stock-based compensation 6,943   6,943    
Taxes paid related to net share settlement of equity awards (shares)   (152)      
Taxes paid related to net share settlement of equity awards (2,850)   (2,850)    
Issuance of common stock, net of issuance costs (shares)   3,049      
Issuance of common stock, net of issuance costs 49,877 $ 1 49,876    
Short swing profit settlement 77   77    
Total comprehensive loss (11,935)        
Net Loss (11,935)       (11,935)
Ending balance (shares) at Dec. 31, 2019   58,877      
Ending balance at Dec. 31, 2019 $ 105,517 $ 6 $ 447,920 $ 0 $ (342,409)