Note 4 - Loans and Allowance for Loan Losses (Details) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Allowance for Loan and Lease Losses, Period Increase (Decrease)	$ (26,000)	$ (321,000)
Allowance for Loan and Lease Losses, Write-offs	0	0
Provision for Loan and Lease Losses Increase (Decrease)		(871,000)
Change in Troubled Debt Restructurings	1.90%
Impaired Financing Receivable, Related Allowance	2,325,000	2,498,000
Minimum Loan Balance for Loans Evaluated by Risk Categories	500,000
Troubled Debt Restructurings [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Loans and Leases Receivable, Impaired, Commitment to Lend	872,000	718,000
Troubled Debt Restructurings [Member] | Commercial and Industrial [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Proceeds from Collection of Loans Receivable	154,000
Troubled Debt Restructurings Performing According to Modified Terms [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Percentage of Loan Portfolio	98.00%	98.00%
Troubled Debt Restructurings [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Increase (Decrease) in Other Loans	235,000
Impaired Financing Receivable, Related Allowance	$ 1,485,000	$ 1,511,000
Commercial and Industrial [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Financing Receivable, Modifications, Number of Contracts	1
Unsecured [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Percentage of Loan Portfolio	5.42%	5.13%