Note 15 - Fair Value Measurement - Changes in Level 3 Assets (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024
Balance		$ 3,281
Servicing rights that result from transfers and sale of financial assets		13	$ 38
Changes in fair value due to changes in model inputs or assumptions (1)		(280)	(550)
Balance		3,014	3,281
Fair Value, Recurring [Member]
Balance		3,281
Balance		3,014	3,281
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Balance		3,281	3,793
Servicing rights that result from transfers and sale of financial assets		13	38
Changes in fair value due to changes in model inputs or assumptions (1)	[1]	(280)	(550)
Balance		3,014	3,281
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage-Backed Securities, Issued by Private Enterprises [Member]
Balance		31,881	27,469
Purchases		0	22,683
Principal payments and maturities		(25,460)	(18,410)
Unrealized Gains		178	139
Balance		$ 6,599	$ 31,881

[1] Represents changes due to collection/realization of expected cash flows and curtailments.