Note 9 - Supplemental Executive Retirement Plan (Details) (USD $)	1 Months Ended		3 Months Ended		3 Months Ended
	Feb. 28, 2014	Feb. 28, 2013 Supplemental Executive Retirement and Death Benefit Agreements [Member]	Mar. 31, 2014 Supplemental Executive Retirement and Death Benefit Agreements [Member]	Mar. 31, 2014 Purchased Fixed Annuity for Financing Retirement Benefits [Member] Other Assets [Member] Supplemental Executive Retirement and Death Benefit Agreements [Member]	Mar. 31, 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 9 - Supplemental Executive Retirement Plan (Details) [Line Items]
Time Period for Calculating Base Salary Under SERP Agreements		5 years
Retirement Age		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
Noninterest Income, Other					41,000
Cash Surrender Value of Life Insurance				11,300,000
Defined Benefit Plan, Net Periodic Benefit Cost			$ 461,000