Note 6 - Loans Receivable and Allowances for Loan Losses (Details)	3 Months Ended	12 Months Ended
Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)
Note 6 - Loans Receivable and Allowances for Loan Losses (Details) [Line Items]
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans	$ 200,000	$ 245,000
Mortgage Loans in Process of Foreclosure, Amount	0		$ 0
Real Estate Acquired Through Foreclosure	$ 11,393,000		$ 11,313,000
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0		1
Residential Portfolio Segment [Member]
Note 6 - Loans Receivable and Allowances for Loan Losses (Details) [Line Items]
Real Estate Acquired Through Foreclosure	$ 157,000		$ 193,000

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- Definition

Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953682-111524

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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
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-Section 50
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- Definition

Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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- Definition

Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 10
-Section S99
-Paragraph 6
-Subparagraph (SX 210.5-04(c)(Schedule III))
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