Note 8 - Real Estate Owned (Detail) - Covered Real Estate Owned (USD $)	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Balance, beginning of period	$ 21,903,204
Balance, end of period	21,029,944
Gain (loss) on real estate sold recognized in noninterest expense	140,244	25,292
Foreclosure of Loans Receivable [Member] | Covered Real Estate [Member]
Real estate acquired	3,907,310	22,602,951
FDIC Loss Sharing Agreement [Member] | Covered Real Estate [Member]
Real estate acquired	9,823,871
Covered Real Estate [Member] | Provision for Losses on Operating and or Development Property [Member]
Provision for losses on real estate owned recognized in noninterest expense	(1,118,381)	(685,500)
Covered Real Estate [Member]
Balance, beginning of period	21,903,204	24,671,626
Increase of FDIC receivable for loss sharing agreements	(195,564)	(7,774,500)
Balance, end of period	21,029,944	21,903,204
Real estate sold	(5,530,820)	(16,911,373)
Gain (loss) on real estate sold recognized in noninterest expense	$ 752,651