Quarterly report pursuant to Section 13 or 15(d)

Note 11 - Stock-based Compensation - Share-based Payment Expense (Details)

v3.21.2
Note 11 - Stock-based Compensation - Share-based Payment Expense (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Share-based payment expense $ 2,164 $ 7,701 $ 8,807 $ 12,102
Research and Development Expense [Member]        
Share-based payment expense 998 933 2,376 1,733
General and Administrative Expense [Member]        
Share-based payment expense $ 1,166 $ 6,768 $ 6,431 $ 10,369