Note 5 - Loans Receivable (Detail) - Covered Loans Acquired (USD $)	Dec. 31, 2012	Sep. 30, 2012
Loans covered by loss sharing agreements
Loans receivable	$ 185,726,102	$ 209,216,524
Non-accretable difference	16,432,725	19,382,172
Allowance for covered loan losses	8,959,002	10,340,815
Unamortized loan origination fees, net	(1,058,414)	(1,101,481)
Total loans covered, net	149,268,548	166,228,316
Impaired Loans at Acquisition [Member] | Residential Real Estate 1-4 Family [Member]
Loans covered by loss sharing agreements
Loans receivable	4,691,507	5,619,110
Impaired Loans at Acquisition [Member] | Commercial Real Estate Other Receivable [Member]
Loans covered by loss sharing agreements
Loans receivable	65,219,748	71,806,980
Impaired Loans at Acquisition [Member] | Commercial [Member]
Loans covered by loss sharing agreements
Loans receivable	10,969,916	12,081,845
Impaired Loans at Acquisition [Member] | Real Estate Construction [Member]
Loans covered by loss sharing agreements
Loans receivable	1,304,345	1,321,752
Impaired Loans at Acquisition [Member] | Consumer Other Financing Receivable [Member]
Loans covered by loss sharing agreements
Loans receivable	628,066	708,832
Impaired Loans at Acquisition [Member] | Accretable Discount [Member]
Loans covered by loss sharing agreements
Deferred fees	8,225,435	9,869,297
Impaired Loans at Acquisition [Member]
Loans covered by loss sharing agreements
Loans receivable	82,813,582	91,538,519
Non-accretable difference	11,931,593	14,285,220
Allowance for covered loan losses	1,210,566	1,793,943
Total loans covered, net	61,445,988	65,590,059
Other Acquired Loans [Member] | Residential Real Estate 1-4 Family [Member]
Loans covered by loss sharing agreements
Loans receivable	8,977,666	9,421,190
Other Acquired Loans [Member] | Commercial Real Estate Other Receivable [Member]
Loans covered by loss sharing agreements
Loans receivable	78,715,378	88,353,272
Other Acquired Loans [Member] | Commercial [Member]
Loans covered by loss sharing agreements
Loans receivable	10,264,766	13,885,559
Other Acquired Loans [Member] | Real Estate Construction [Member]
Loans covered by loss sharing agreements
Loans receivable	130,000	559,675
Other Acquired Loans [Member] | Consumer Other Financing Receivable [Member]
Loans covered by loss sharing agreements
Loans receivable	4,824,710	5,458,309
Other Acquired Loans [Member] | Unamortized Loan Origination Fees [Member]
Loans covered by loss sharing agreements
Unamortized loan origination fees, net	28,802	32,146
Other Acquired Loans [Member] | Accretable Discount [Member]
Loans covered by loss sharing agreements
Deferred fees	2,542,181	3,055,050
Other Acquired Loans [Member] | Discount on Acquired Performing Loans [Member]
Loans covered by loss sharing agreements
Deferred fees	269,409	308,728
Other Acquired Loans [Member]
Loans covered by loss sharing agreements
Loans receivable	102,912,520	117,678,005
Non-accretable difference	4,501,132	5,096,952
Allowance for covered loan losses	7,748,436	8,546,872
Total loans covered, net	87,822,560	100,638,257
Residential Real Estate 1-4 Family [Member]
Loans covered by loss sharing agreements
Loans receivable	13,669,173	15,040,300
Commercial Real Estate Other Receivable [Member]
Loans covered by loss sharing agreements
Loans receivable	143,935,126	160,160,252
Commercial [Member]
Loans covered by loss sharing agreements
Loans receivable	21,234,682	25,967,404
Real Estate Construction [Member]
Loans covered by loss sharing agreements
Loans receivable	1,434,345	1,881,427
Consumer Other Financing Receivable [Member]
Loans covered by loss sharing agreements
Loans receivable	5,452,776	6,167,141
Unamortized Loan Origination Fees [Member]
Loans covered by loss sharing agreements
Unamortized loan origination fees, net	28,802	32,146
Accretable Discount [Member]
Loans covered by loss sharing agreements
Deferred fees	10,767,616	12,924,347
Discount on Acquired Performing Loans [Member]
Loans covered by loss sharing agreements
Deferred fees	$ 269,409	$ 308,728