Note 4 - Loans Receivable and Allowance for Credit Losses - Schedule of Collateral-dependent Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Total loan receivable, net of allowance for credit losses on loans	$ 1,996,737	$ 2,000,578
Real Estate [Member]
Total loan receivable, net of allowance for credit losses on loans	5,415	10,793
Collateral Held Business Assets [Member]
Total loan receivable, net of allowance for credit losses on loans	0	0
Other Collateral Held [Member]
Total loan receivable, net of allowance for credit losses on loans	0	0
Commercial Portfolio Segment [Member] \| Real Estate [Member]
Total loan receivable, net of allowance for credit losses on loans	675	688
Commercial Portfolio Segment [Member] \| Collateral Held Business Assets [Member]
Total loan receivable, net of allowance for credit losses on loans	0	0
Commercial Portfolio Segment [Member] \| Other Collateral Held [Member]
Total loan receivable, net of allowance for credit losses on loans	0	0
Construction Portfolio Segment [Member] \| Real Estate [Member]
Total loan receivable, net of allowance for credit losses on loans	1,091	1,091
Construction Portfolio Segment [Member] \| Collateral Held Business Assets [Member]
Total loan receivable, net of allowance for credit losses on loans	0	0
Construction Portfolio Segment [Member] \| Other Collateral Held [Member]
Total loan receivable, net of allowance for credit losses on loans	0	0
Real Estate Portfolio Segment [Member] \| Real Estate [Member] \| Mortgage on Commercial Property Occupied by Owner [Member]
Total loan receivable, net of allowance for credit losses on loans	400	400
Real Estate Portfolio Segment [Member] \| Real Estate [Member] \| Mortgage on Commercial Property Occupied by Non Owners [Member]
Total loan receivable, net of allowance for credit losses on loans	603	3,668
Real Estate Portfolio Segment [Member] \| Real Estate [Member] \| Mortgage on Residential Properties Occupied by One to Four Families [Member]
Total loan receivable, net of allowance for credit losses on loans	1,723	2,965
Real Estate Portfolio Segment [Member] \| Real Estate [Member] \| Mortgage on Residential Properties Occupied by One to Four Family Investment [Member]
Total loan receivable, net of allowance for credit losses on loans	772	1,840
Real Estate Portfolio Segment [Member] \| Real Estate [Member] \| Mortgage on Residential Properties Occupied by Multifamily [Member]
Total loan receivable, net of allowance for credit losses on loans	0	0
Real Estate Portfolio Segment [Member] \| Collateral Held Business Assets [Member] \| Mortgage on Commercial Property Occupied by Owner [Member]
Total loan receivable, net of allowance for credit losses on loans	0	0
Real Estate Portfolio Segment [Member] \| Collateral Held Business Assets [Member] \| Mortgage on Commercial Property Occupied by Non Owners [Member]
Total loan receivable, net of allowance for credit losses on loans	0	0
Real Estate Portfolio Segment [Member] \| Collateral Held Business Assets [Member] \| Mortgage on Residential Properties Occupied by One to Four Families [Member]
Total loan receivable, net of allowance for credit losses on loans	0	0
Real Estate Portfolio Segment [Member] \| Collateral Held Business Assets [Member] \| Mortgage on Residential Properties Occupied by One to Four Family Investment [Member]
Total loan receivable, net of allowance for credit losses on loans	0	0
Real Estate Portfolio Segment [Member] \| Collateral Held Business Assets [Member] \| Mortgage on Residential Properties Occupied by Multifamily [Member]
Total loan receivable, net of allowance for credit losses on loans	0	0
Real Estate Portfolio Segment [Member] \| Other Collateral Held [Member] \| Mortgage on Commercial Property Occupied by Owner [Member]
Total loan receivable, net of allowance for credit losses on loans	0	0
Real Estate Portfolio Segment [Member] \| Other Collateral Held [Member] \| Mortgage on Commercial Property Occupied by Non Owners [Member]
Total loan receivable, net of allowance for credit losses on loans	0	0
Real Estate Portfolio Segment [Member] \| Other Collateral Held [Member] \| Mortgage on Residential Properties Occupied by One to Four Families [Member]
Total loan receivable, net of allowance for credit losses on loans	0	0
Real Estate Portfolio Segment [Member] \| Other Collateral Held [Member] \| Mortgage on Residential Properties Occupied by One to Four Family Investment [Member]
Total loan receivable, net of allowance for credit losses on loans	0	0
Real Estate Portfolio Segment [Member] \| Other Collateral Held [Member] \| Mortgage on Residential Properties Occupied by Multifamily [Member]
Total loan receivable, net of allowance for credit losses on loans	0	0
Consumer Portfolio Segment [Member] \| Real Estate [Member]
Total loan receivable, net of allowance for credit losses on loans	151	141
Consumer Portfolio Segment [Member] \| Collateral Held Business Assets [Member]
Total loan receivable, net of allowance for credit losses on loans	0	0
Consumer Portfolio Segment [Member] \| Other Collateral Held [Member]
Total loan receivable, net of allowance for credit losses on loans	$ 0	$ 0

Note 4 - Loans Receivable and Allowance for Credit Losses - Schedule of Collateral-dependent Loans (Details) - USD ($)
$ in Thousands

Jun. 30, 2026

Dec. 31, 2025

Total loan receivable, net of allowance for credit losses on loans

$ 1,996,737

$ 2,000,578

Real Estate [Member]

Total loan receivable, net of allowance for credit losses on loans

5,415

10,793

Collateral Held Business Assets [Member]

Total loan receivable, net of allowance for credit losses on loans