Note 4 - Loans Receivable and Allowance for Loan Losses (Details) - Impaired Loans (USD $)	Dec. 31, 2014	Dec. 31, 2013
With no related allowance recorded:
Loans with an allowance recorded, recorded investment	$ 11,717,000	$ 14,482,000
Loans with an allowance recorded, unpaid principal balance	13,511,000	18,191,000
Loans with an allowance recorded, recorded investment	7,000	7,539,000
Loans with an allowance recorded, unpaid principal balance	7,000	8,195,000
Loans, related allowance	7,000	1,891,000
Loans with an allowance recorded, recorded investment	11,724,000	22,021,000
Loans with an allowance recorded, unpaid principal balance	13,518,000	26,386,000
Loans, related allowance	7,000	1,891,000
Commercial Portfolio Segment [Member]
With no related allowance recorded:
Loans with an allowance recorded, recorded investment	2,000	2,000
Loans with an allowance recorded, unpaid principal balance	104,000	151,000
Loans with an allowance recorded, recorded investment		6,150,000
Loans with an allowance recorded, unpaid principal balance		6,150,000
Loans, related allowance		1,500,000
Loans with an allowance recorded, recorded investment	2,000	6,152,000
Loans with an allowance recorded, unpaid principal balance	104,000	6,301,000
Loans, related allowance		1,500,000
Commercial Real Estate Portfolio Segment [Member]
With no related allowance recorded:
Loans with an allowance recorded, recorded investment	7,398,000	7,596,000
Loans with an allowance recorded, unpaid principal balance	8,249,000	8,316,000
Loans with an allowance recorded, recorded investment		170,000
Loans with an allowance recorded, unpaid principal balance		214,000
Loans, related allowance		31,000
Loans with an allowance recorded, recorded investment	7,398,000	7,766,000
Loans with an allowance recorded, unpaid principal balance	8,249,000	8,530,000
Loans, related allowance		31,000
Real Estate Construction [Member]
With no related allowance recorded:
Loans with an allowance recorded, unpaid principal balance	732,000
Loans with an allowance recorded, recorded investment		260,000
Loans with an allowance recorded, unpaid principal balance		732,000
Loans, related allowance		260,000
Loans with an allowance recorded, recorded investment		260,000
Loans with an allowance recorded, unpaid principal balance	732,000	732,000
Loans, related allowance		260,000
Real Estate Construction to Permanent [Member]
With no related allowance recorded:
Loans with an allowance recorded, recorded investment		1,189,000
Loans with an allowance recorded, unpaid principal balance		1,417,000
Loans with an allowance recorded, recorded investment		1,189,000
Loans with an allowance recorded, unpaid principal balance		1,417,000
Residential Portfolio Segment [Member]
With no related allowance recorded:
Loans with an allowance recorded, recorded investment	3,764,000	5,103,000
Loans with an allowance recorded, unpaid principal balance	3,793,000	7,636,000
Loans with an allowance recorded, recorded investment		957,000
Loans with an allowance recorded, unpaid principal balance		1,097,000
Loans, related allowance		98,000
Loans with an allowance recorded, recorded investment	3,764,000	6,060,000
Loans with an allowance recorded, unpaid principal balance	3,793,000	8,733,000
Loans, related allowance		98,000
Consumer Portfolio Segment [Member]
With no related allowance recorded:
Loans with an allowance recorded, recorded investment	553,000	592,000
Loans with an allowance recorded, unpaid principal balance	633,000	671,000
Loans with an allowance recorded, recorded investment	7,000	2,000
Loans with an allowance recorded, unpaid principal balance	7,000	2,000
Loans, related allowance	7,000	2,000
Loans with an allowance recorded, recorded investment	560,000	594,000
Loans with an allowance recorded, unpaid principal balance	640,000	673,000
Loans, related allowance	$ 7,000	$ 2,000

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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=35738203&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)

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+ 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)(4)

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+ References

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-Publisher FASB

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (a)(4)

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