Note 3 - Investment Securities (Details Textual) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2024	Jun. 30, 2023
Equity Securities, FV-NI	$ 947	$ 947
Equity Securities, FV-NI, Unrealized Gain (Loss)		(178)	$ (0)
Precision BioSciences, Inc. [Member]
Equity Securities, FV-NI	900	900
Equity Securities, FV-NI, Unrealized Gain (Loss)	$ 400	$ 200