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Note 3 - Loans Receivables and Allowance for Loan Losses (Details Textual)	1 Months Ended	3 Months Ended
	Mar. 31, 2017 USD ($)	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)
Maximum Period of Credit Extension of Construction Loans		1 year 180 days
Period for Charged Off of Open-End Credits		180 days
Period for Charged Off of Close-End Credits		120 days
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans		$ 21,000	$ 17,000
Threshold Period Past Due for Write-off of Financing Receivable		90 days
Maximum Period for Charged Off of Consumer Installment Loans		180 days
Performance Period Under Loan Terms		180 days
Financing Receivable, Modifications, Number of Contracts		0	0
Impaired Financing Receivable, Recorded Investment	$ 8,885,000	$ 8,885,000		$ 8,951,000
Impaired Financing Receivable, Related Allowance	232,000	232,000		231,000
Loans and Leases Receivable, Impaired, Commitment to Lend	0	0		0
Non-Accrual Loans [Member]
Impaired Financing Receivable, Interest Income, Cash Basis Method		$ 0	$ 0
Commercial Real Estate Portfolio Segment [Member]
Maximum Percentage of Credit Extension Based on Market Value of Collateral		75.00%
Impaired Financing Receivable, Recorded Investment	6,204,000	$ 6,204,000		6,267,000
Impaired Financing Receivable, Related Allowance
Multi-family Real Estate [Member]
Maximum Percentage of Credit Extension Based on Market Value of Collateral		80.00%
Construction Portfolio Segment [Member]
Percentage of Maximum Loan to Value		75.00%
Impaired Financing Receivable, Recorded Investment
Impaired Financing Receivable, Related Allowance
Commercial Portfolio Segment [Member]
Proceeds from Insurance Settlement, Investing Activities	2,800,000
Impaired Financing Receivable, Recorded Investment	232,000	232,000		231,000
Impaired Financing Receivable, Related Allowance	$ 232,000	$ 232,000		$ 231,000

X

- Definition

Maximum percentage of credit extension based on market value of collateral.

+ References

No definition available.

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- Definition

Maximum period for charged off of consumer installment loans.

+ References

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- Definition

Maximum period of credit extension of construction loans.

+ References

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- Definition

Percentage of maximum loan to value.

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- Definition

Represents performance period under loan terms.

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- Definition

Period for charged off of close end credits.

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Period for charged off of open end credits

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No definition available.

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

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- Definition

Amount of interest income recognized on a cash-basis method of accounting that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(3)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

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Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953550-111524

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Amount of allowance for credit losses related to recorded investment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524

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- Definition

Reflects the unfunded portion of contractual agreements to lend funds to borrowers for loans whose terms have been modified by troubled debt restructuring.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82895541&loc=d3e18794-111554

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- Definition

Reflects the amount of additional interest income that would have been recorded if impaired or nonperforming loans were instead current, in compliance with their original terms, and outstanding throughout the reporting period or since origination (if held for part of the period).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82895541&loc=d3e18794-111554

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- Definition

Amount of cash inflow for proceeds from settlement of insurance claim, classified as investing activities. Excludes insurance settlement classified as operating activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585

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-Name Accounting Standards Codification
-Topic 230
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-Section 45
-Paragraph 21B
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Threshold period past due for financing receivable to write off as uncollectible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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