Note 6 - Loans (Details) - Financing Receivables Modified as Troubled Debt Restructurings within Previous 12 Months for Payment Default (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Note 6 - Loans (Details) - Financing Receivables Modified as Troubled Debt Restructurings within Previous 12 Months for Payment Default [Line Items]
Number of Contracts	2
Recorded Investment	$ 1,187
Commercial Portfolio Segment [Member]
Note 6 - Loans (Details) - Financing Receivables Modified as Troubled Debt Restructurings within Previous 12 Months for Payment Default [Line Items]
Number of Contracts	1
Recorded Investment	453
Commercial Real Estate Other Receivable [Member]
Note 6 - Loans (Details) - Financing Receivables Modified as Troubled Debt Restructurings within Previous 12 Months for Payment Default [Line Items]
Number of Contracts	1
Recorded Investment	$ 734