Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized - USD ($) $ in Thousands		9 Months Ended		12 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	[1],[2]	$ 15,902	$ 15,974	$ 16,311
Interest income recognized	[1]	267	384	473
Closed-end First Liens [Member]
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	[1],[2]	685	385	555
Interest income recognized	[1]	33	19	31
Closed-end Junior Liens [Member]
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	[1],[2]	231	251	249
Interest income recognized	[1]	11	12	16
Investor-owned Residential Real Estate [Member]
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	[1],[2]	76	78	77
Interest income recognized	[1]	4	4	5
Multifamily Real Estate [Member]
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	[1],[2]	$ 2,670	$ 2,807	$ 2,773
Interest income recognized	[1]
Commercial Real Estate, Owner Occupied [Member]
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	[1],[2]	$ 5,302	$ 5,606	$ 5,836
Interest income recognized	[1]	86	153	203
Commercial Real Estate, Other [Member]
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	[1],[2]	5,924	6,134	6,114
Interest income recognized	[1]	128	164	175
Commercial and Industrial [Member]
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	[1],[2]	1,014	713	707
Interest income recognized	[1]	$ 5	$ 32	$ 43
Automobile Loan [Member]
Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	[1],[2]
Interest income recognized	[1]

[1] Only classes with impaired loans are shown.

[2] Recorded investment is net of charge-offs and interest paid while a loan is in nonaccrual status.