Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	$ 16,311	[1],[2]	$ 16,654	[1]	$ 13,540	[1]
Interest income recognized	473	[2]	267		9
Closed-end First Liens [Member] | Consumer Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	555	[1],[2]	364	[1],[2]	873	[1],[2]
Interest income recognized	31	[2]	3	[2]	2	[2]
Closed-end Junior Liens [Member] | Consumer Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	249	[1],[2]	280	[1],[2]	234	[1],[2]
Interest income recognized	16	[2]	9	[2]		[2]
Investor-owned Residential Real Estate [Member] | Consumer Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	77	[1],[2]	131	[1],[2]
Interest income recognized	5	[2]	6	[2]
Multifamily Real Estate [Member] | Commercial Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	2,773	[1],[2]	4,172	[1],[2]	1,466	[1],[2]
Interest income recognized		[2]		[2]	5	[2]
Commercial Real Estate, Owner Occupied [Member] | Commercial Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	5,836	[1],[2]	5,265	[1],[2]	4,806	[1],[2]
Interest income recognized	203	[2]	136	[2]	1	[2]
Commercial Real Estate, Other [Member] | Commercial Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	6,114	[1],[2]	3,369	[1],[2]
Interest income recognized	175	[2]	110	[2]
Commercial and Industrial [Member] | Commercial Non Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	707	[1],[2]	117	[1],[2]
Interest income recognized	43	[2]	3	[2]
Construction Residential [Member] | Real Estate Construction [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment			40	[1],[2]	1,171	[1],[2]
Interest income recognized				[2]		[2]
Construction Other [Member] | Real Estate Construction [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment			2,885	[1],[2]	4,290	[1],[2]
Interest income recognized				[2]	1	[2]
Automobile [Member] | Consumer Non Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment			31	[1],[2]	4	[1],[2]
Interest income recognized				[2]		[2]
Equity Lines [Member] | Consumer Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment					101	[1],[2]
Interest income recognized						[2]
Commercial [Member] | Commercial Non Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment					570	[1],[2]
Interest income recognized						[2]
Other Consumer Loans [Member] | Consumer Non Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment					25	[1],[2]
Interest income recognized						[2]

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

[2] Only classes with impaired loans are shown.