Note 11 - Supplemental Executive Retirement Plan (Details) (USD $)	1 Months Ended		3 Months Ended	6 Months Ended		3 Months Ended	6 Months Ended
	Feb. 28, 2014	Feb. 28, 2013 Supplemental Executive Retirement and Death Benefit Agreements [Member]	Jun. 30, 2014 Supplemental Executive Retirement and Death Benefit Agreements [Member]	Jun. 30, 2014 Supplemental Executive Retirement and Death Benefit Agreements [Member]	Jun. 30, 2014 Purchased Fixed Annuity for Financing Retirement Benefits [Member] Other Assets [Member] Supplemental Executive Retirement and Death Benefit Agreements [Member]	Jun. 30, 2014 Purchased Fixed Annuity for Financing Retirement Benefits [Member] Supplemental Executive Retirement and Death Benefit Agreements [Member]	Jun. 30, 2014 Purchased Fixed Annuity for Financing Retirement Benefits [Member] Supplemental Executive Retirement and Death Benefit Agreements [Member]	Feb. 28, 2013 Purchased Fixed Annuity for Financing Retirement Benefits [Member] Supplemental Executive Retirement and Death Benefit Agreements [Member]
Note 11 - Supplemental Executive Retirement Plan (Details) [Line Items]
Time Period for Calculating Base Salary Under SERP Agreements		5 years
Retirement Age			67	67
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	5 years	6 years
Retirement Plan Monthly Installments		180
Other Investments								$ 10,700,000
Investment Yield Adjustment						99,000
Noninterest Income, Other						(72,000)	31,000
Cash Surrender Value of Life Insurance					11,200,000
Defined Benefit Plan, Net Periodic Benefit Cost			$ 461,000	$ 922,000