Note 4 - Loans and Allowance for Loan Losses (Details) - Recorded Investment in Impaired Loans (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Real estate - residential mortgage:
With Specific Allowance - Specific Allowance	$ 1,681		$ 1,601
Real estate - residential mortgage:
Recorded Principal Balance	12,146		16,171
Unpaid Principal Balance	13,707		17,849
Specific Allowance	1,681		1,601
Average Investment In Impaired Loans	12,410	17,293
Interest Income Recognized	1	26
One to Four Family Units [Member]
Real estate - residential mortgage:
Without Specific Allowance - Recorded Principal Balance	676		620
Without Specific Allowance - Unpaid Principal Balance	676		620
Without Specific Allowance - Average Investment In Impaired Loans	681	2,140
Without Specific Allowance - Interest Income Recognized	1	2
Real estate - residential mortgage:
With Specific Allowance - Recorded Principal Balance	262		267
With Specific Allowance - Unpaid Principal Balance	262		267
With Specific Allowance - Specific Allowance	8		8
With Specific Allowance - Average Investment In Impaired Loans	334	107
Real estate - residential mortgage:
Recorded Principal Balance	938		887
Unpaid Principal Balance	938		887
Specific Allowance	8		8
Average Investment In Impaired Loans	1,015	2,247
Interest Income Recognized	1	2
Real Estate Construction [Member]
Real estate - residential mortgage:
Without Specific Allowance - Recorded Principal Balance	94		96
Without Specific Allowance - Unpaid Principal Balance	94		940
Without Specific Allowance - Average Investment In Impaired Loans	95	5,107
Real estate - residential mortgage:
With Specific Allowance - Recorded Principal Balance	3,898		4,433
With Specific Allowance - Unpaid Principal Balance	4,742		4,433
With Specific Allowance - Specific Allowance	739		890
With Specific Allowance - Average Investment In Impaired Loans	4,234	1,104
Real estate - residential mortgage:
Recorded Principal Balance	3,992		4,529
Unpaid Principal Balance	4,836		5,373
Specific Allowance	739		890
Average Investment In Impaired Loans	4,329	6,211
Real Estate Commercial [Member]
Real estate - residential mortgage:
Without Specific Allowance - Recorded Principal Balance	386		3,663
Without Specific Allowance - Unpaid Principal Balance	386		3,663
Without Specific Allowance - Average Investment In Impaired Loans	553	3,190
Without Specific Allowance - Interest Income Recognized		23
Real estate - residential mortgage:
With Specific Allowance - Recorded Principal Balance	750
With Specific Allowance - Unpaid Principal Balance	750
With Specific Allowance - Specific Allowance	253
With Specific Allowance - Average Investment In Impaired Loans	250	2,245
Real estate - residential mortgage:
Recorded Principal Balance	1,136		3,663
Unpaid Principal Balance	1,136		3,663
Specific Allowance	253
Average Investment In Impaired Loans	803	5,435
Interest Income Recognized		23
Commercial Loans [Member]
Real estate - residential mortgage:
Without Specific Allowance - Recorded Principal Balance	3,584		2,327
Without Specific Allowance - Unpaid Principal Balance	4,301		2,462
Without Specific Allowance - Average Investment In Impaired Loans	2,689	643
Without Specific Allowance - Interest Income Recognized		1
Real estate - residential mortgage:
With Specific Allowance - Recorded Principal Balance	2,075		4,449
With Specific Allowance - Unpaid Principal Balance	2,075		5,148
With Specific Allowance - Specific Allowance	657		601
With Specific Allowance - Average Investment In Impaired Loans	3,096	2,281
Real estate - residential mortgage:
Recorded Principal Balance	5,659		6,776
Unpaid Principal Balance	6,376		7,610
Specific Allowance	657		601
Average Investment In Impaired Loans	5,785	2,924
Interest Income Recognized		1
Consumer and Other Loans [Member]
Real estate - residential mortgage:
Without Specific Allowance - Average Investment In Impaired Loans		102
Real estate - residential mortgage:
With Specific Allowance - Recorded Principal Balance	421		316
With Specific Allowance - Unpaid Principal Balance	421		316
With Specific Allowance - Specific Allowance	24		102
With Specific Allowance - Average Investment In Impaired Loans	478	374
Real estate - residential mortgage:
Recorded Principal Balance	421		316
Unpaid Principal Balance	421		316
Specific Allowance	24		102
Average Investment In Impaired Loans	$ 478	$ 476

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- Definition

Average 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 15

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 17

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5258-111524

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- Definition

Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

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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=28368275&loc=SL6953550-111524

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- Definition

Amount of allowance for credit losses related to recorded investment.

+ References

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+ References

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Amount of interest income, recognized on accrual basis, on financing receivables that are recognized as impaired, for which there is no related allowance for credit losses.

+ References

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Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.

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- Definition

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