Note 4 - Securities Available for Sale (Detail) - Credit Losses on Investment Securities (USD $)	3 Months Ended
Dec. 31, 2011	Dec. 31, 2012	Sep. 30, 2012
Beginning balance of credit losses previously recognized in earnings	$ 4,822,916	$ 380,446	$ 380,446
Amount related to credit losses for securities for which an other-than-temporary impairment was recognized in earnings	100,000
Ending balance of cumulative credit losses recognized in earnings	$ 4,922,916	$ 380,446	$ 380,446

The cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity).

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The amount of other than temporary impairment (OTTI) losses on equity securities, OTTI related to credit losses on debt securities, and OTTI losses on debt securities when the entity intends to sell the securities or it is more likely than not that the entity will be required to sell the securities before recovery of its amortized cost basis. Additionally, this item includes OTTI losses recognized during the period on investments accounted for under the cost method of accounting.

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