Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (unaudited)

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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (unaudited) - USD ($)
shares in Thousands, $ in Thousands
Convertible Preferred Stock
Common Stock
Additional Paid-In Capital
Accumulated Deficit
Total
Balance at Dec. 31, 2018   $ 65 $ 1,211,122 $ (1,192,402) $ 18,785
Balance (in shares) at Dec. 31, 2018 6 8,691      
Increase (Decrease) in Stockholders' Equity          
Exercise of stock options     115   115
Exercise of stock options (in shares)   24      
Issuance of common stock related to 401(k) contribution     102   102
Issuance of common stock related to 401(k) contribution (in shares)   7      
Vesting of restricted stock units (in shares)   2      
Stock-based compensation expense     1,728   1,728
Issuance of common stock     66   66
Net income (loss) and comprehensive income loss       3,233 3,233
Balance at Mar. 31, 2019   $ 65 1,213,133 (1,189,169) 24,029
Balance (in shares) at Mar. 31, 2019 6 8,724      
Balance at Dec. 31, 2018   $ 65 1,211,122 (1,192,402) 18,785
Balance (in shares) at Dec. 31, 2018 6 8,691      
Increase (Decrease) in Stockholders' Equity          
Net income (loss) and comprehensive income loss         (839)
Balance at Jun. 30, 2019   $ 65 1,214,168 (1,193,241) 20,992
Balance (in shares) at Jun. 30, 2019 6 8,728      
Balance at Mar. 31, 2019   $ 65 1,213,133 (1,189,169) 24,029
Balance (in shares) at Mar. 31, 2019 6 8,724      
Increase (Decrease) in Stockholders' Equity          
Exercise of stock options     8   8
Exercise of stock options (in shares)   2      
Issuance of common stock related to ESPP     16   16
Issuance of common stock related to ESPP (in shares)   2      
Stock-based compensation expense     1,011   1,011
Net income (loss) and comprehensive income loss       (4,072) (4,072)
Balance at Jun. 30, 2019   $ 65 1,214,168 (1,193,241) 20,992
Balance (in shares) at Jun. 30, 2019 6 8,728      
Balance at Dec. 31, 2019   $ 73 1,238,299 (1,194,384) 43,988 [1]
Balance (in shares) at Dec. 31, 2019 6 9,759      
Increase (Decrease) in Stockholders' Equity          
Issuance of common stock related to 401(k) contribution     88   88
Issuance of common stock related to 401(k) contribution (in shares)   3      
Stock-based compensation expense     1,788   1,788
Disgorgement of stockholder's short-swing profits     13   13
Net income (loss) and comprehensive income loss       (4,758) (4,758)
Balance at Mar. 31, 2020   $ 73 1,240,188 (1,199,142) 41,119
Balance (in shares) at Mar. 31, 2020 6 9,762      
Balance at Dec. 31, 2019   $ 73 1,238,299 (1,194,384) 43,988 [1]
Balance (in shares) at Dec. 31, 2019 6 9,759      
Increase (Decrease) in Stockholders' Equity          
Net income (loss) and comprehensive income loss         (8,291)
Balance at Jun. 30, 2020   $ 83 1,240,987 (1,202,675) 38,395
Balance (in shares) at Jun. 30, 2020 5 11,018      
Balance at Mar. 31, 2020   $ 73 1,240,188 (1,199,142) 41,119
Balance (in shares) at Mar. 31, 2020 6 9,762      
Increase (Decrease) in Stockholders' Equity          
Exercise of stock options     10   10
Exercise of stock options (in shares)   2      
Issuance of common stock related to ESPP     26   26
Issuance of common stock related to ESPP (in shares)   1      
Issuance of common stock related to Series Y preferred stock conversion   $ 10 (10)    
Issuance of common stock related to Series Y preferred stock conversion (in shares) (1) 1,253      
Stock-based compensation expense     773   773
Net income (loss) and comprehensive income loss       (3,533) (3,533)
Balance at Jun. 30, 2020   $ 83 $ 1,240,987 $ (1,202,675) $ 38,395
Balance (in shares) at Jun. 30, 2020 5 11,018      
[1] The consolidated balance sheet as of December 31, 2019 has been derived from the audited consolidated financial statements as of that date included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019.