Note 5 - Credit Quality and the Allowance for Loan and Lease Losses (Detail) (USD $)	Mar. 31, 2013	Mar. 31, 2012
Financing Receivable, Modifications, Number of Contracts	6	4
Financing Receivable, Modifications, Recorded Investment (in Dollars)		$ 743,000
Modified in Current Reporting Period [Member]
Financing Receivable, Modifications, Recorded Investment (in Dollars)	697,000

The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 40

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6951948&loc=d3e18845-111554

Name:	us-gaap_FinancingReceivableModificationsRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant