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Note 4 - Loans Receivable - Loans Receivable (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
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, net	1,081,798		1,168,008
Commercial Portfolio Segment [Member]
Loans receivable	126,609		145,714
Allowance for loan losses	(856)		(1,308)
Finance Leases Portfolio Segment [Member]
Loans receivable	247,997		272,629
Allowance for loan losses	(802)		(757)
Consumer Portfolio Segment [Member]
Loans receivable	1,783		2,211
Allowance for loan losses	(46)		(40)
One-to-Four Family Residential Real Estate [Member] | Real Estate Portfolio [Member]
Loans receivable	48,928		55,750
Allowance for loan losses	(665)		(675)
Multi-family Mortgage [Member] | Real Estate Portfolio [Member]
Loans receivable	536,619		563,750
Allowance for loan losses	(4,185)		(3,676)
Nonresidential Real Estate [Member]
Allowance for loan losses	(1,602)	$ (1,460)	(1,176)	$ (1,195)	$ (1,487)	$ (1,476)
Nonresidential Real Estate [Member] | Real Estate Portfolio [Member]
Loans receivable	127,560		134,674
Allowance for loan losses	$ (1,602)		$ (1,176)

X

- Definition

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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- Definition

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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