Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Statements of Changes in Stockholders' Equity

v3.19.1
Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Underwritten Public Offering
Common Stock
Common Stock
Underwritten Public Offering
Additional Paid-in Capital
Additional Paid-in Capital
Underwritten Public Offering
Accumulated Other Comprehensive Loss
Accumulated Deficit
Beginning balance at Dec. 31, 2017 $ 177,864   $ 3   $ 474,662   $ (151) $ (296,650)
Beginning balance (in shares) at Dec. 31, 2017     30,730          
Issuance of common stock, net of commissions and offering costs, value   $ 293,289   $ 1   $ 293,288    
Issuance of common stock, net of commissions and offering costs, shares       12,604        
RSU settlements, net of shares withheld (3,363)       (3,363)      
RSU settlements, net of shares withheld, shares     250          
Issuance of common stock pursuant to employee stock awards 6,196       6,196      
Issuance of common stock pursuant to employee stock awards, shares     309          
Stock-based compensation expense 7,014       7,014      
Net loss (41,443)             (41,443)
Unrealized gain (loss) on available-for-sale securities (373)           (373)  
Ending balance at Mar. 31, 2018 439,184   $ 4   777,797   (524) (338,093)
Ending balance (in shares) at Mar. 31, 2018     43,893          
Beginning balance at Dec. 31, 2018 338,857   $ 5   866,541   (340) (527,349)
Beginning balance (in shares) at Dec. 31, 2018     45,951          
Effect of the adoption of ASC topic 842 (Leases) at Dec. 31, 2018 364             364
Balance at Dec. 31, 2018 339,221   $ 5   866,541   (340) (526,985)
RSU settlements, net of shares withheld (4,575)       (4,575)      
RSU settlements, net of shares withheld, shares     197          
Issuance of common stock pursuant to employee stock awards 2,898       2,898      
Issuance of common stock pursuant to employee stock awards, shares     159          
Stock-based compensation expense 12,269       12,269      
Net loss (66,257)             (66,257)
Unrealized gain (loss) on available-for-sale securities 378           378  
Ending balance at Mar. 31, 2019 $ 283,934   $ 5   $ 877,133   $ 38 $ (593,242)
Ending balance (in shares) at Mar. 31, 2019     46,307