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Note 4 - Loans and Allowance for Loan Losses (Details) - Allowance Related to Troubled Debt Restructurings - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Note 4 - Loans and Allowance for Loan Losses (Details) - Allowance Related to Troubled Debt Restructurings [Line Items]
Allowance for losses, troubled debt restructurings	$ 1,108,000	$ 5,793,000
Commercial Portfolio Segment [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Allowance Related to Troubled Debt Restructurings [Line Items]
Allowance for losses, troubled debt restructurings	1,088,000	5,793,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Allowance Related to Troubled Debt Restructurings [Line Items]
Allowance for losses, troubled debt restructurings	221,000	16,000
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Allowance Related to Troubled Debt Restructurings [Line Items]
Allowance for losses, troubled debt restructurings	186,000	151,000
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Allowance Related to Troubled Debt Restructurings [Line Items]
Allowance for losses, troubled debt restructurings	115,000	182,000
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Allowance Related to Troubled Debt Restructurings [Line Items]
Allowance for losses, troubled debt restructurings	201,000	4,778,000
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Allowance Related to Troubled Debt Restructurings [Line Items]
Allowance for losses, troubled debt restructurings	365,000	666,000
Retail Portfolio Segment [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Allowance Related to Troubled Debt Restructurings [Line Items]
Allowance for losses, troubled debt restructurings	20,000	0
Retail Portfolio Segment [Member] | Home Equity and Other [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Allowance Related to Troubled Debt Restructurings [Line Items]
Allowance for losses, troubled debt restructurings	14,000	0
Retail Portfolio Segment [Member] | 1-4 Family Mortgages [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) - Allowance Related to Troubled Debt Restructurings [Line Items]
Allowance for losses, troubled debt restructurings	$ 6,000	$ 0

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