Note 3 - Securities (Detail) - The Amortized Cost and Estimated Fair Value of Investment Securities (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Due in one year or less	$ 420
Due in one year or less	423
Due in over one to five years	4,220
Due in over one to five years	4,288
Due in over one to five years	1,010
Due in over one to five years	1,016
Due in over five to ten years	9,648
Due in over five to ten years	9,889
Due after ten years	9,372
Due after ten years	9,693
Agency mortgage-backed securities, residential	100,529	84,214
Agency mortgage-backed securities, residential	103,489	85,670
Agency mortgage-backed securities, residential	23,678	22,848
Agency mortgage-backed securities, residential	24,311	22,847
Total debt securities	100,529
Total debt securities	103,489
Total debt securities	23,678
Total debt securities	24,311
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Agency mortgage-backed securities, residential	99,519	76,203
Agency mortgage-backed securities, residential	102,473	77,598
Agency mortgage-backed securities, residential	18
Agency mortgage-backed securities, residential	$ 18

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.2)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

-Paragraph 7

-Footnote 2

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 19

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.