Note 14 - Stockholders' Equity (Details) (USD $)	0 Months Ended				9 Months Ended			0 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended
	Apr. 07, 2014		Jan. 10, 2014		Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Jun. 04, 2014 Series B Preferred Stock [Member]	Sep. 30, 2014 Series B Preferred Stock [Member]	Dec. 31, 2013 Series B Preferred Stock [Member]	Sep. 30, 2014 Equity Distribution Agreement with JMP Securities [Member]	Sep. 30, 2013 Equity Distribution Agreement with JMP Securities [Member]	Jun. 11, 2012 Equity Distribution Agreement with JMP Securities [Member]
Note 14 - Stockholders' Equity (Details) [Line Items]
Preferred Stock, Shares Authorized					200,000,000			3,450,000	3,450,000	3,450,000
Preferred Stock, Par or Stated Value Per Share (in Dollars per share)					$ 0.01			$ 0.01	$ 0.01	$ 0.01
Preferred Stock, Shares Issued					3,000,000		3,000,000		3,000,000	3,000,000
Preferred Stock, Shares Outstanding					3,000,000		3,000,000		3,000,000	3,000,000
Stock Issued During Period, Shares, New Issues								3,000,000			0	480,014
Preferred Stock, Dividend Rate, Percentage								7.75%	7.75%	7.75%
Preferred Stock, Liquidation Preference Per Share (in Dollars per share)								$ 25	$ 25	$ 25
Proceeds from Issuance of Preferred Stock and Preference Stock (in Dollars)						$ 72,637,000		$ 72,400,000
Preferred Stock, Redemption Price Per Share (in Dollars per share)									$ 25.00
Preferred Stock, Redemption Period									120 days
Common Stock, Value, Subscriptions (in Dollars)													25,000,000
Proceeds from Issuance of Common Stock (in Dollars)	$ 109,916,000	[1]	$ 75,846,000	[1]	$ 186,081,000	$ 98,172,000						$ 3,500,000

[1] Proceeds are net of underwriting costs and offering expenses paid by the Company.