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Note 4 - Loans Receivable - Allowance for Loan Losses and Loans Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allowance for loan losses, individually evaluated for impairment	$ 30	$ 28
Allowance for loan losses, collectively evaluated for impairment	6,685	7,723
Allowance for loan losses	6,715	7,751	$ 7,632
Loan balances, individually evaluated for impairment	2,170	2,534
Loan balances, collectively evaluated for impairment	1,048,468	1,007,424
Loans receivable	1,050,638	1,009,958
Net deferred loan origination costs	284	371
Allowance for loan losses	(6,715)	(7,751)	(7,632)
Loans receivable, net of allowance for loan losses: December 31, 2021, $6,715 and December 31, 2020, $7,751	1,044,207	1,002,578
Real Estate Portfolio [Member] | One-to-Four Family Residential Real Estate [Member]
Allowance for loan losses, individually evaluated for impairment	0	0
Allowance for loan losses, collectively evaluated for impairment	331	518
Allowance for loan losses	331	518	675
Loan balances, individually evaluated for impairment	1,299	1,718
Loan balances, collectively evaluated for impairment	28,834	39,973
Loans receivable	30,133	41,691
Allowance for loan losses	(331)	(518)	(675)
Real Estate Portfolio [Member] | Multi-family Mortgage [Member]
Allowance for loan losses, individually evaluated for impairment	0	0
Allowance for loan losses, collectively evaluated for impairment	3,377	4,062
Allowance for loan losses	3,377	4,062	3,676
Loan balances, individually evaluated for impairment	498	520
Loan balances, collectively evaluated for impairment	425,638	451,721
Loans receivable	426,136	452,241
Allowance for loan losses	(3,377)	(4,062)	(3,676)
Real Estate Portfolio [Member] | Nonresidential Real Estate [Member]
Allowance for loan losses, individually evaluated for impairment	30	28
Allowance for loan losses, collectively evaluated for impairment	1,281	1,541
Allowance for loan losses	1,311	1,569	1,176
Loan balances, individually evaluated for impairment	297	296
Loan balances, collectively evaluated for impairment	102,875	108,362
Loans receivable	103,172	108,658
Allowance for loan losses	(1,311)	(1,569)	(1,176)
Construction and Land Loans [Member]
Allowance for loan losses, individually evaluated for impairment		0
Allowance for loan losses, collectively evaluated for impairment		12
Allowance for loan losses		12
Loan balances, individually evaluated for impairment		0
Loan balances, collectively evaluated for impairment		499
Loans receivable		499
Allowance for loan losses		(12)
Commercial Portfolio Segment [Member]
Allowance for loan losses, individually evaluated for impairment	0	0
Allowance for loan losses, collectively evaluated for impairment	1,652	1,536
Allowance for loan losses	1,652	1,536	2,065
Loan balances, individually evaluated for impairment	76	0
Loan balances, collectively evaluated for impairment	489,436	405,057
Loans receivable	489,512	405,057
Allowance for loan losses	(1,652)	(1,536)	(2,065)
Consumer Portfolio Segment [Member]
Allowance for loan losses, individually evaluated for impairment	0	0
Allowance for loan losses, collectively evaluated for impairment	44	54
Allowance for loan losses	44	54	40
Loan balances, individually evaluated for impairment	0	0
Loan balances, collectively evaluated for impairment	1,685	1,812
Loans receivable	1,685	1,812
Allowance for loan losses	$ (44)	$ (54)	$ (40)

X

- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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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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