XML 15 R5.htm IDEA: XBRL DOCUMENT v3.22.1
CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Unaudited) - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in Capital
Accumulated Deficit
Treasury Stock
Beginning balance at Dec. 31, 2020 $ 44,425   $ 331,450 $ (286,073) $ (952)
Beginning balance, Shares at Dec. 31, 2020   53,503,124      
Stock option exercises 1,297   1,297    
Stock option exercises, Shares   676,791      
Issuance of common stock under employee stock purchase plan 418   418    
Issuance of common stock under employee stock purchase plan, Shares   90,796      
Share-based compensation expense 3,632   3,632    
Issuance of common stock to collaboration partners 27,739   27,739    
Issuance of common stock to collaboration partners, Shares   3,762,190      
Net loss (18,689)     (18,689)  
Ending balance at Mar. 31, 2021 58,822   364,536 (304,762) (952)
Ending balance, Shares at Mar. 31, 2021   58,032,901      
Beginning balance at Dec. 31, 2021 $ 91,168   408,795 (316,675) (952)
Beginning balance, Shares at Dec. 31, 2021 61,712,577 61,712,577      
Stock option exercises $ 340   340    
Stock option exercises, Shares 233,001 233,001      
Issuance of common stock under employee stock purchase plan $ 282   282    
Issuance of common stock under employee stock purchase plan, Shares   78,060      
Share-based compensation expense 4,390   4,390    
Proceeds from issuance of common stock, net of issuance cost 1,647   1,647    
Proceeds from issuance of common stock, net of issuance cost, Shares   561,405      
Net loss (28,168)     (28,168)  
Ending balance at Mar. 31, 2022 $ 69,659   $ 415,454 $ (344,843) $ (952)
Ending balance, Shares at Mar. 31, 2022 62,585,043 62,585,043