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Note 2 - Investment Securities (Detail) (USD $)	3 Months Ended
Note 2 - Investment Securities (Detail) (USD $)	Jun. 30, 2012	Jun. 30, 2011
Number of Securities	354
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	47
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Period Increase (Decrease) (in Dollars)	$ 62,400	$ 118,847

Disclosure regarding factors used to determine that the impairment of securities not categorized as either held-to-maturity securities or trading securities (hence equal to available for sale securities) where cost exceeds fair value is not an other than temporary impairment (OTTI). This item contains disclosure of the number of investment positions in the available-for-sale investments determined to be temporarily impaired.

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