Note 3 - Loans (Detail) - Loan Modifications (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Commercial and Industrial [Member] | Quarter to Date [Member]
Troubled Debt Restructurings Number of contracts	3	2
Troubled Debt Restructurings Pre-modification outstanding recorded investment	$ 190	$ 504
Troubled Debt Restructurings Post-modification outstanding recorded investment	187	504
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	0	0
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	0	0
Commercial and Industrial [Member] | Year to Date [Member]
Troubled Debt Restructurings Number of contracts	9	5
Troubled Debt Restructurings Pre-modification outstanding recorded investment	998	2,095
Troubled Debt Restructurings Post-modification outstanding recorded investment	988	2,098
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	5	1
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	1,143	150
Commercial Real Estate Loans [Member] | Quarter to Date [Member]
Troubled Debt Restructurings Number of contracts	4	6
Troubled Debt Restructurings Pre-modification outstanding recorded investment	1,613	911
Troubled Debt Restructurings Post-modification outstanding recorded investment	1,590	908
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	0	3
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	0	1,084
Commercial Real Estate Loans [Member] | Year to Date [Member]
Troubled Debt Restructurings Number of contracts	12	21
Troubled Debt Restructurings Pre-modification outstanding recorded investment	3,598	5,425
Troubled Debt Restructurings Post-modification outstanding recorded investment	3,573	4,886
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	4	5
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	401	2,162
First Lien Residential Mortgage Loans [Member] | Quarter to Date [Member]
Troubled Debt Restructurings Number of contracts	6	11
Troubled Debt Restructurings Pre-modification outstanding recorded investment	871	884
Troubled Debt Restructurings Post-modification outstanding recorded investment	870	875
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	1	2
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	64	215
First Lien Residential Mortgage Loans [Member] | Year to Date [Member]
Troubled Debt Restructurings Number of contracts	16	16
Troubled Debt Restructurings Pre-modification outstanding recorded investment	1,673	1,482
Troubled Debt Restructurings Post-modification outstanding recorded investment	1,669	1,498
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	1	9
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	64	1,023
Junior Lein Residential Mortgage Loans [Member] | Quarter to Date [Member]
Troubled Debt Restructurings Number of contracts	1	0
Troubled Debt Restructurings Pre-modification outstanding recorded investment	15	0
Troubled Debt Restructurings Post-modification outstanding recorded investment	15	0
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	1	0
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	9	0
Junior Lein Residential Mortgage Loans [Member] | Year to Date [Member]
Troubled Debt Restructurings Number of contracts	3	0
Troubled Debt Restructurings Pre-modification outstanding recorded investment	118	0
Troubled Debt Restructurings Post-modification outstanding recorded investment	118	0
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	1	0
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	9	0
Consumer Loans [Member] | Quarter to Date [Member]
Troubled Debt Restructurings Number of contracts	0	0
Troubled Debt Restructurings Pre-modification outstanding recorded investment	0	0
Troubled Debt Restructurings Post-modification outstanding recorded investment	0	0
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	0	0
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	0	0
Consumer Loans [Member] | Year to Date [Member]
Troubled Debt Restructurings Number of contracts	2	0
Troubled Debt Restructurings Pre-modification outstanding recorded investment	107	0
Troubled Debt Restructurings Post-modification outstanding recorded investment	107	0
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	0	0
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	0	0
Quarter to Date [Member]
Troubled Debt Restructurings Number of contracts	19	14
Troubled Debt Restructurings Pre-modification outstanding recorded investment	2,299	2,689
Troubled Debt Restructurings Post-modification outstanding recorded investment	2,287	2,662
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	5	2
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	1,299	73
Year to Date [Member]
Troubled Debt Restructurings Number of contracts	42	42
Troubled Debt Restructurings Pre-modification outstanding recorded investment	6,494	9,002
Troubled Debt Restructurings Post-modification outstanding recorded investment	6,455	8,482
Troubled Debt Restructurings that Subsequently Defaulted Number of contracts	11	15
Troubled Debt Restructurings that Subsequently Defaulted Recorded investment	$ 1,617	$ 3,335