Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.1
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 Income
Accumulated Deficit
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 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          
Beginning balance at Dec. 31, 2020 462,339   $ 8   1,586,616   296 (1,124,581)
Beginning balance (in shares) at Dec. 31, 2020     83,372          
Issuance of common stock, net of commissions and offering costs, value   $ 2,382       $ 2,382    
Issuance of common stock, net of commissions and offering costs, shares       146        
RSU settlements, net of shares withheld (1,231)       (1,231)      
RSU settlements, net of shares withheld, shares     449          
Issuance of common stock pursuant to employee stock awards 1,749       1,749      
Issuance of common stock pursuant to employee stock awards, shares     108          
Stock-based compensation expense 12,268       12,268      
Net loss (78,335)             (78,335)
Unrealized loss on available-for-sale securities (135)           (135)  
Ending balance at Mar. 31, 2021 $ 399,037   $ 8   $ 1,601,784   $ 161 $ (1,202,916)
Ending balance (in shares) at Mar. 31, 2021     84,075