Note 5 - Loans (Details) - Internal Credit Quality Indicators of Gross Loans (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013		Sep. 30, 2013
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	$ 776,947		$ 767,513		$ 756,814
Construction, Land Development and Other Land Loan [Member] | Grade Three [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	2,747		10,025
Construction, Land Development and Other Land Loan [Member] | Grade Four [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	17,533		34,654
Construction, Land Development and Other Land Loan [Member] | Grade W [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	9,991		8,679
Construction, Land Development and Other Land Loan [Member] | Grade Five [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	149		2,202
Construction, Land Development and Other Land Loan [Member] | Grade Six [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	1,938		4,400
Construction, Land Development and Other Land Loan [Member] | Grade Seven [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	544		803
Construction, Land Development and Other Land Loan [Member] | Not Risk Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	15,843	[1]	15,795	[1]
Construction, Land Development and Other Land Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	48,745		76,558
Multi Family Residential [Member] | Grade Three [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	8,950		259
Multi Family Residential [Member] | Grade Four [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	1,180		887
Multi Family Residential [Member] | Grade W [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	7,815		9,079
Multi Family Residential [Member] | Grade Six [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross			181
Multi Family Residential [Member] | Not Risk Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	25	[1]	11	[1]
Multi Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	17,970		10,417
Non Farm Nonresidential [Member] | Grade Three [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	76,742		69,954
Non Farm Nonresidential [Member] | Grade Four [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	178,794		171,585
Non Farm Nonresidential [Member] | Grade W [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	79,065		83,843
Non Farm Nonresidential [Member] | Grade Five [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	16,512		16,727
Non Farm Nonresidential [Member] | Grade Six [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	26,866		24,352
Non Farm Nonresidential [Member] | Grade Seven [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	1,554		1,604
Non Farm Nonresidential [Member] | Not Risk Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross		[1]	412	[1]
Non Farm Nonresidential [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	379,533		368,477
Commercial Real Estate Portfolio Segment [Member] | Grade Three [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	88,439		80,238
Commercial Real Estate Portfolio Segment [Member] | Grade Four [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	197,507		207,126
Commercial Real Estate Portfolio Segment [Member] | Grade W [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	96,871		101,601
Commercial Real Estate Portfolio Segment [Member] | Grade Five [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	16,661		18,929
Commercial Real Estate Portfolio Segment [Member] | Grade Six [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	28,804		28,933
Commercial Real Estate Portfolio Segment [Member] | Grade Seven [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	2,098		2,407
Commercial Real Estate Portfolio Segment [Member] | Not Risk Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	15,868	[1]	16,218	[1]
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	446,248		455,452
Commercial and Industrial [Member] | Grade One [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	803		879
Commercial and Industrial [Member] | Grade Two [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	1,588		1,186
Commercial and Industrial [Member] | Grade Three [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	11,883		8,830
Commercial and Industrial [Member] | Grade Four [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	51,683		51,167
Commercial and Industrial [Member] | Grade W [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	4,063		5,151
Commercial and Industrial [Member] | Grade Five [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	335		2,361
Commercial and Industrial [Member] | Grade Six [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	2,751		2,923
Commercial and Industrial [Member] | Grade Seven [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	415		494
Commercial and Industrial [Member] | Not Risk Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	42		87
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, gross	$ 73,563		$ 73,078		$ 67,097

[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.