Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited)

v3.20.1
Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
Total
At The Market Offering
Common Stock
Common Stock
At The Market Offering
Additional Paid-in Capital
Additional Paid-in Capital
At The Market Offering
Accumulated Other Comprehensive (Loss) Income
Accumulated Deficit
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
Beginning balance, as adjusted 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 (loss) gain 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          
Beginning balance at Dec. 31, 2019 290,781   $ 6   1,108,516   220 (817,961)
Beginning balance (in shares) at Dec. 31, 2019     56,806          
Issuance of common stock, net of commissions and offering costs, value   $ 22,987       $ 22,987    
Issuance of common stock, net of commissions and offering costs, shares       1,528        
Exercise of pre-funded warrants, shares     57          
RSU settlements, net of shares withheld (1,395)       (1,395)      
RSU settlements, net of shares withheld, shares     455          
Issuance of common stock pursuant to employee stock awards 1,330       1,330      
Issuance of common stock pursuant to employee stock awards, shares     94          
Stock-based compensation expense 12,644       12,644      
Net loss (73,509)             (73,509)
Unrealized (loss) gain on available-for-sale securities (16)           (16)  
Ending balance at Mar. 31, 2020 $ 252,822   $ 6   $ 1,144,082   $ 204 $ (891,470)
Ending balance (in shares) at Mar. 31, 2020     58,940