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Note 4 - Allowance for Loan Losses (Details Textual) $ in Thousands	3 Months Ended			6 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($)	Jun. 30, 2019	Sep. 30, 2018 USD ($)	Jun. 30, 2019	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Financing Receivable, Troubled Debt Restructuring	$ 371				$ 371		$ 467
Financing Receivable, Modifications, Number of Contracts		0	1			1
Financing Receivable, Increase (Decrease) in Allowance for Credit Loss Due to TDR Loans			$ 19			$ 19
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	0		$ 0		0	$ 0
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member]
Financing Receivable, Modifications, Number of Contracts				1
Performing Financial Instruments [Member]
Financing Receivable, Troubled Debt Restructuring	$ 0				$ 0		$ 264

X

- Definition

Represents the increase (decrease) in the amount of allowance for credit loss on financing receivable due to troubled debt restructurings. Excludes allowance for financing receivable covered under loss sharing agreement.

+ References

No definition available.

+ Details

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X

- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524

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- Definition

Amount of financing receivable modified as troubled debt restructuring.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=118939409&loc=d3e18845-111554

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- Definition

Amount of financing receivable modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953682-111524

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