Note 3 - Loans Receivable - Restructurings of Financing Receivables (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2026 USD ($)	Dec. 31, 2025 USD ($)
Restructured amount	$ 8,319	$ 7,668
Number restructured	5	3
Payment Deferral [Member]
Restructured amount	$ 8,319	$ 7,668
Number restructured	5	3
Contractual Interest Rate Reduction [Member]
Restructured amount		$ 0
Number restructured		0
Residential Portfolio Segment [Member] \| One to Four Family [Member]
Restructured amount	$ 1,613	$ 962
Number restructured	4	2
Commercial Real Estate Portfolio Segment [Member]
Restructured amount	$ 6,706	$ 6,706
Number restructured	1	1
Accruing [Member]
Restructured amount	$ 6,706	$ 6,706
Number restructured	1	1
Accruing [Member] \| Residential Portfolio Segment [Member] \| One to Four Family [Member]
Restructured amount	$ 0	$ 0
Number restructured	0	0
Accruing [Member] \| Commercial Real Estate Portfolio Segment [Member]
Restructured amount	$ 6,706	$ 6,706
Number restructured	1	1
Performing Financial Instruments [Member]
Restructured amount	$ 8,319	$ 7,668
Number restructured	5	3
Performing Financial Instruments [Member] \| Payment Deferral [Member]
Restructured amount	$ 8,319	$ 7,668
Number restructured	5	3
Performing Financial Instruments [Member] \| Contractual Interest Rate Reduction [Member]
Restructured amount		$ 0
Number restructured		0
Non Accruing [Member]
Restructured amount	$ 1,613	$ 962
Number restructured	4	2
Non Accruing [Member] \| Residential Portfolio Segment [Member] \| One to Four Family [Member]
Restructured amount	$ 1,613	$ 962
Number restructured	4	2
Non Accruing [Member] \| Commercial Real Estate Portfolio Segment [Member]
Restructured amount	$ 0	$ 0
Number restructured	0	0
Nonperforming Financial Instruments [Member]
Restructured amount	$ 0	$ 0
Number restructured	0	0
Nonperforming Financial Instruments [Member] \| Payment Deferral [Member]
Restructured amount	$ 0	$ 0
Number restructured	0	0
Nonperforming Financial Instruments [Member] \| Contractual Interest Rate Reduction [Member]
Restructured amount		$ 0
Number restructured		0