Note 5 - Loans (Details) - Internal Credit Quality Indicators of Gross Loans (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Construction, Land Development and Other Land Loan [Member] | Grade Three [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	$ 10,829		$ 10,025
Construction, Land Development and Other Land Loan [Member] | Grade Four [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	30,820		34,654
Construction, Land Development and Other Land Loan [Member] | Grade W [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	9,252		8,679
Construction, Land Development and Other Land Loan [Member] | Grade Five [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	1,188		2,202
Construction, Land Development and Other Land Loan [Member] | Grade Six [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	2,212		4,400
Construction, Land Development and Other Land Loan [Member] | Grade Seven [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	544		803
Construction, Land Development and Other Land Loan [Member] | Not Risk Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	16,580	[1]	15,795	[1]
Construction, Land Development and Other Land Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	71,425		76,558
Multi Family Residential [Member] | Grade Three [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	157		259
Multi Family Residential [Member] | Grade Four [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	1,198		887
Multi Family Residential [Member] | Grade W [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	7,938		9,079
Multi Family Residential [Member] | Grade Six [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial			181
Multi Family Residential [Member] | Not Risk Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	1	[1]	11	[1]
Multi Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	9,294		10,417
Non Farm Nonresidential [Member] | Grade Three [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	64,867		69,954
Non Farm Nonresidential [Member] | Grade Four [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	170,994		171,585
Non Farm Nonresidential [Member] | Grade W [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	78,806		83,843
Non Farm Nonresidential [Member] | Grade Five [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	18,830		16,727
Non Farm Nonresidential [Member] | Grade Six [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	25,320		24,352
Non Farm Nonresidential [Member] | Grade Seven [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	1,581		1,604
Non Farm Nonresidential [Member] | Not Risk Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	53	[1]	412	[1]
Non Farm Nonresidential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	360,451		368,477
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	441,170		455,452
Grade Three [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	75,853		80,238
Grade Four [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	203,012		207,126
Grade W [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	95,996		101,601
Grade Five [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	20,018		18,929
Grade Six [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	27,532		28,933
Grade Seven [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	2,125		2,407
Not Risk Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans and lease receivable commercial	$ 16,634	[1]	$ 16,218	[1]

[1] Consumer real estate loans, included within construction, land development and other land loans, are not risk rated in accordance with the Company's policy.