Quarterly report pursuant to Section 13 or 15(d)

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

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Note 12 - Share-based Compensation - Share-based Compensation Expense (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Total share-based compensation $ 443 $ 380 $ 931 $ 802
Research and Development Expense [Member]        
Total share-based compensation 107 140 302 272
General and Administrative Expense [Member]        
Total share-based compensation $ 336 $ 240 $ 629 $ 530