Note 5 - Loans Receivable (Detail) - Changes in the Carrying Value of the FDIC Receivable (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012
Balance, beginning of period	$ 35,135,533	$ 96,777,791
Payments made to (received from) FDIC	7,836,747	(80,528,485)
Accretion of fair value adjustment	147,674	1,461,779
Recovery of previous loss reimbursements	(3,082,024)	(3,252,736)
Provision for estimated losses on covered assets recognized in noninterest expense	1,425,814	15,976,659
External expenses qualifying under loss sharing agreements	1,357,626	4,700,525
Balance, end of period	$ 42,821,370	$ 35,135,533