Note 7 - Accrued Expenses - Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Compensation expense	$ 8,735	$ 3,015
Research and development fees	1,971	5,758
Accrued accounts payable	1,348	1,245
Other current liabilities	575	483
Accrued license obligations	135	245
Total	$ 12,764	$ 10,746