Note 3 - Securities - Summary of Gains and Losses (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Net change in the unrealized gain (loss) recognized during the period on marketable equity securities		$ 60	$ (80)	$ 57	$ (112)
Add: Net realized gain (loss) recognized on marketable equity securities sold during the period		0	0	0	0
Net gain (loss) recognized in net income during the period on marketable equity securities still held at the reporting date	[1]	$ 60	$ (80)	$ 57	$ (112)

[1] Not within the scope of ASC 606