Note 5 - Shareholders' Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		2 Months Ended			1 Months Ended	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 Restricted Stock [Member]	Mar. 31, 2014 Restricted Stock [Member] Minimum [Member]	Mar. 31, 2014 Restricted Stock [Member] Maximum [Member]	Feb. 28, 2014 Series A Preferred Stock [Member]	Mar. 31, 2014 Equity Distribution Agreement [Member]
Note 5 - Shareholders' Equity (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)			679,714
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value				$ 5.92	$ 6.14
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period				3 years	5 years
Preferred Stock, Dividends, Per Share, Cash Paid						$ 0.515625
Common Stock, Dividends, Per Share, Declared	$ 0.065	$ 0.060
Dividend Distribution Increase Percentage	8.30%
Common Stock Capital Shares Reserved For Future Issuance, Value (in Dollars)							$ 50
Stock Issued During Period, Shares, New Issues (in Shares)							0