Note 13 - Fair Value Measurement - Changes in Level 3 Assets (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Balance at beginning of period				$ 3,793
Balance at end of period		$ 3,584		3,584
Fair Value, Recurring [Member]
Balance at beginning of period				3,793
Balance at end of period		3,584		3,584
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Balance at beginning of period		3,740	$ 3,825	3,793	$ 3,887
Servicing rights that result from transfers and sale of financial assets		5	71	38	145
Changes in fair value due to changes in model inputs or assumptions (1)	[1]	(161)	(167)	(247)	(303)
Balance at end of period		3,584	3,729	3,584	3,729
Partnership Investments [Member]
Balance at beginning of period		12,823	12,733	13,183	12,563
Total		12,650	12,787	12,650	12,787
Funding contributions (1)	[2]	80	126	6,386	335
Distributions received (1)	[2]	(283)	(57)	(6,782)	(404)
Unrealized Gains (Losses)		30	(15)	(137)	293
Mortgage-Backed Securities, Issued by Private Enterprises [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Balance at beginning of period		17,231	29,378	27,469	29,599
Principal payments received		(148)	0	(10,530)	0
Unrealized Gains (Losses)		12	(186)	156	(407)
Total		$ 17,095	$ 29,192	$ 17,095	$ 29,192

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

[2] In the second quarter of 2024, a redemption of First Northwest's limited partnership investment in Meriwether Group Hero Fund LP was offset by a subsequent limited partnership investment in the same entity by First Fed.