Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands
Total
Convertible Preferred Stock [Member]
Common Stock [Member]
Additional Paid-In Capital [Member]
Accumulated Deficit [Member]
Balance at Dec. 31, 2016 $ (47,210)   $ 46 $ 1,146,357 $ (1,193,613)
Balance (in shares) at Dec. 31, 2016     6,114    
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Cumulative effect adjustment to accumulated deficit due to adoption of ASU 2016-09       42 (42)
Exercise of stock options 658   $ 1 657  
Exercise of stock options (in shares)     110    
Issuance of common stock related to 401(k) contribution and ESPP 532   $ 1 531  
Issuance of common stock related to 401(k) contribution and ESPP (in shares)     102    
Vesting of restricted stock units     $ 1 (1)  
Vesting of restricted stock units (in shares)     74    
Stock-based compensation expense 7,301     7,301  
Issuance of convertible preferred stock 20,019     20,019  
Issuance of convertible preferred stock (in shares)   5      
Issuance of common stock 9,890   $ 13 9,877  
Issuance of common stock (in shares)     1,849    
Net income (loss) and comprehensive income (loss) 14,596       14,596
Balance at Dec. 31, 2017 5,786   $ 62 1,184,783 (1,179,059)
Balance (in shares) at Dec. 31, 2017   5 8,249    
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Exercise of stock options 367   $ 1 366  
Exercise of stock options (in shares)     68    
Issuance of common stock related to 401(k) contribution and ESPP 64     64  
Issuance of common stock related to 401(k) contribution and ESPP (in shares)     4    
Vesting of restricted stock units (in shares)     16    
Stock-based compensation expense 3,902     3,902  
Issuance of warrants 139     139  
Issuance of convertible preferred stock 16,004     16,004  
Issuance of convertible preferred stock (in shares)   1      
Issuance of common stock 5,866   $ 2 5,864  
Issuance of common stock (in shares)     354    
Net income (loss) and comprehensive income (loss) (13,343)       (13,343)
Balance at Dec. 31, 2018 $ 18,785   $ 65 $ 1,211,122 $ (1,192,402)
Balance (in shares) at Dec. 31, 2018   6 8,691