Note 11 - Fair Value of Financial Instruments and Fair Value Measurement (Detail) - Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (USD $)	Dec. 31, 2012	Sep. 30, 2012
Non-Covered Real Estate [Member] | Fair Value, Inputs, Level 3 [Member]
Other real estate owned:
Other Real Estate	$ 1,414,421	$ 2,106,757
Non-Covered Real Estate [Member]
Other real estate owned:
Other Real Estate	1,414,421	2,106,757
Covered Real Estate [Member] | Fair Value, Inputs, Level 3 [Member]
Other real estate owned:
Other Real Estate	21,029,944	21,903,204
Covered Real Estate [Member]
Other real estate owned:
Other Real Estate	21,029,944	21,903,204
Non Covered Loans [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans:
Impaired Loans	1,352,918	2,925,972
Non Covered Loans [Member]
Impaired loans:
Impaired Loans	$ 1,352,918	$ 2,925,972