Note 4 - Loans Receivable - Activity in the Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Beginning balance	$ 8,112	$ 8,354	$ 7,632	$ 8,470
Provision for loan losses	42	3,957	513	3,870
Loans charged off	(17)	(4,503)	(35)	(4,559)
Recoveries	19	16	46	43
Total ending allowance balance	8,156	7,824	8,156	7,824
One To Four Family Residential Real Estate Loans [Member]
Beginning balance	682	649	675	699
Provision for loan losses	(20)	(42)	(21)	(86)
Loans charged off	0	(50)	(5)	(73)
Recoveries	3	6	16	23
Total ending allowance balance	665	563	665	563
Multi Family Mortgage Loans [Member]
Beginning balance	3,869	4,079	3,676	3,991
Provision for loan losses	301	(99)	482	(19)
Loans charged off	0	0	0	0
Recoveries	15	8	27	16
Total ending allowance balance	4,185	3,988	4,185	3,988
Nonresidential Real Estate [Member]
Beginning balance	1,460	1,487	1,176	1,476
Provision for loan losses	142	(292)	426	(253)
Loans charged off	0	0	0	(28)
Recoveries	0	0	0	0
Total ending allowance balance	1,602	1,195	1,602	1,195
Construction and Land Loans [Member]
Beginning balance	0	3	0	4
Provision for loan losses	0	0	0	(1)
Loans charged off	0	0	0	0
Recoveries	0	0	0	0
Total ending allowance balance	0	3	0	3
Commercial Loan [Member]
Beginning balance	1,275	1,422	1,308	1,517
Provision for loan losses	(420)	4,313	(455)	4,216
Loans charged off	0	(4,443)	0	(4,443)
Recoveries	1	2	3	4
Total ending allowance balance	856	1,294	856	1,294
Finance Leases Portfolio Segment [Member]
Beginning balance	780	690	757	755
Provision for loan losses	22	60	45	(5)
Loans charged off	0	0	0	0
Recoveries	0	0	0	0
Total ending allowance balance	802	750	802	750
Consumer Loan [Member]
Beginning balance	46	24	40	28
Provision for loan losses	17	17	36	18
Loans charged off	(17)	(10)	(30)	(15)
Recoveries	0	0	0	0
Total ending allowance balance	$ 46	$ 31	$ 46	$ 31

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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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 expense related to estimated loss from loan and lease transactions.

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