Quarterly report pursuant to Section 13 or 15(d)

Note 12 - Stock-based Compensation - Share-based Payment Expense (Details)

v3.23.3
Note 12 - Stock-based Compensation - Share-based Payment Expense (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Share-based Payment Arrangement, Expense $ 599 $ 1,053 $ 3,242 $ 4,346
Research and Development Expense [Member]        
Share-based Payment Arrangement, Expense 259 440 1,182 1,923
General and Administrative Expense [Member]        
Share-based Payment Arrangement, Expense $ 340 $ 613 $ 2,060 $ 2,423