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Note 4 - Loans Receivable - Allowance for Loan Losses and Loans Receivable (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Allowance for loan losses, individually evaluated for impairment	$ 0		$ 0
Allowance for loan losses, collectively evaluated for impairment	8,156		7,632
Allowance for loan losses	8,156	$ 8,112	7,632	$ 7,824	$ 8,354	$ 8,470
Loan balances, individually evaluated for impairment	3,493		2,743
Loan balances, collectively evaluated for impairment	1,086,003		1,171,985
Loans receivable	1,089,496		1,174,728
Net deferred loan origination costs	458		912
Allowance for loan losses	(8,156)	(8,112)	(7,632)	(7,824)	(8,354)	(8,470)
Loans receivable, net of allowance for loan losses: June 30, 2020, $8,156 and December 31, 2019, $7,632	1,081,798		1,168,008
Nonresidential Real Estate [Member]
Allowance for loan losses, individually evaluated for impairment			0
Allowance for loan losses	1,602	1,460	1,176	1,195	1,487	1,476
Allowance for loan losses	(1,602)	$ (1,460)	(1,176)	$ (1,195)	$ (1,487)	$ (1,476)
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	665		675
Allowance for loan losses	665		675
Loan balances, individually evaluated for impairment	1,768		1,835
Loan balances, collectively evaluated for impairment	47,160		53,915
Loans receivable	48,928		55,750
Allowance for loan losses	(665)		(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	4,185		3,676
Allowance for loan losses	4,185		3,676
Loan balances, individually evaluated for impairment	604		620
Loan balances, collectively evaluated for impairment	536,015		563,130
Loans receivable	536,619		563,750
Allowance for loan losses	(4,185)		(3,676)
Real Estate Portfolio [Member] | Nonresidential Real Estate [Member]
Allowance for loan losses, individually evaluated for impairment	0		0
Allowance for loan losses, collectively evaluated for impairment	1,602		1,176
Allowance for loan losses	1,602		1,176
Loan balances, individually evaluated for impairment	288		288
Loan balances, collectively evaluated for impairment	127,272		134,386
Loans receivable	127,560		134,674
Allowance for loan losses	(1,602)		(1,176)
Commercial Portfolio Segment [Member]
Allowance for loan losses, individually evaluated for impairment	0		0
Allowance for loan losses, collectively evaluated for impairment	856		1,308
Allowance for loan losses	856		1,308
Loan balances, individually evaluated for impairment	0		0
Loan balances, collectively evaluated for impairment	126,609		145,714
Loans receivable	126,609		145,714
Allowance for loan losses	(856)		(1,308)
Finance Leases Portfolio Segment [Member]
Allowance for loan losses, individually evaluated for impairment	0		0
Allowance for loan losses, collectively evaluated for impairment	802		757
Allowance for loan losses	802		757
Loan balances, individually evaluated for impairment	833		0
Loan balances, collectively evaluated for impairment	247,164		272,629
Loans receivable	247,997		272,629
Allowance for loan losses	(802)		(757)
Consumer Portfolio Segment [Member]
Allowance for loan losses, individually evaluated for impairment	0		0
Allowance for loan losses, collectively evaluated for impairment	46		40
Allowance for loan losses	46		40
Loan balances, individually evaluated for impairment	0		0
Loan balances, collectively evaluated for impairment	1,783		2,211
Loans receivable	1,783		2,211
Allowance for loan losses	$ (46)		$ (40)

X

- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
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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 of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts 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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