Note 9 - Loans (Detail) - Impaired Loans (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
Sep. 30, 2012	Mar. 31, 2012
Impaired loans for which a valuation allowance has been provided	$ 0	$ 0
Impaired loans for which no valuation allowance has been provided	7,089	8,631
Total loans determined to be impaired	7,089	8,631
Allowance for loans losses related to impaired loans	0	0
Average recorded investment in impaired loans	7,934	8,546
Cash basis interest income recognized on impaired Loans	$ 90	$ 153

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 17

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5258-111524

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- Definition

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- Definition

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+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 14A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524

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