Note 3 - Business Combinations (Detail) - Consideration Paid by the Company in the Merger (Parentheticals) (Citizens South Banking Corporation [Member])	3 Months Ended	5 Months Ended
Mar. 31, 2013 As Recorded by the Company [Member]	Oct. 02, 2012
Common shares issued (in Shares)	11,857,226	11,857,226

Number of shares of equity interests issued or issuable to acquire entity.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration