Note 3 - Investment Securities (Details) (USD $)	3 Months Ended	9 Months Ended	12 Months Ended
	Jun. 30, 2012	Sep. 30, 2013	Dec. 31, 2012
Note 3 - Investment Securities (Details) [Line Items]
Number of Securities		545
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		341
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss (in Dollars)		$ 15,478	$ 23,469
Other than Temporary Impairment Losses, Investments (in Dollars)	$ 62,400
Unrealized Losses 12 Months or Greater [Member]
Note 3 - Investment Securities (Details) [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions		1