Note 4 - Loans Receivable - Loans Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Loans receivable	$ 1,233,287	$ 1,050,638
Net deferred loan origination costs	1,585	284
Allowance for loan losses	(8,129)	(6,715)	$ (7,751)
Loans, net	1,226,743	1,044,207
Commercial Portfolio Segment [Member]
Loans receivable	552,494	489,512
Allowance for loan losses	(2,548)	(1,652)	(1,536)
Consumer Portfolio Segment [Member]
Loans receivable	1,584	1,685
Allowance for loan losses	(49)	(44)	(54)
One-to-Four Family Residential Real Estate [Member] \| Real Estate Portfolio [Member]
Loans receivable	23,094	30,133
Allowance for loan losses	(281)	(331)	(518)
Multi-family Mortgage [Member] \| Real Estate Portfolio [Member]
Loans receivable	536,295	426,136
Allowance for loan losses	(4,013)	(3,377)	(4,062)
Nonresidential Real Estate [Member] \| Real Estate Portfolio [Member]
Loans receivable	119,660	103,172
Allowance for loan losses	(1,234)	(1,311)	(1,569)
Construction and Land Loans [Member]
Loans receivable	160	0
Allowance for loan losses	$ (4)	$ 0	$ (12)

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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Amount of deferred fees paid by borrowers and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield. Excludes amounts for loans and leases covered under loss sharing agreements.

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