Note 11 - Stockholders' Equity (Details) (USD $)	9 Months Ended				0 Months Ended	12 Months Ended					0 Months Ended	1 Months Ended		0 Months Ended	12 Months Ended	0 Months Ended		1 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Feb. 22, 2013 Series A Convertible Preferred Stock (Member) February 2013 Preferred Stock Offering [Member]	Dec. 31, 2013 Series A Convertible Preferred Stock (Member) February 2013 Preferred Stock Offering [Member]	Mar. 31, 2013 Series A Convertible Preferred Stock (Member) February 2013 Preferred Stock Offering [Member]	Feb. 26, 2013 Series A Convertible Preferred Stock (Member) February 2013 Preferred Stock Offering [Member]	Jan. 15, 2014 Series A Warrant [Member] January 2014 Common Stock Offering [Member]	Jan. 15, 2014 Series B Warrant [Member] January 2014 Common Stock Offering [Member]	Jan. 15, 2014 January 2014 Common Stock Offering [Member]	Feb. 25, 2013 ATM Agreement [Member]	Feb. 28, 2013 ATM Agreement [Member]	Feb. 26, 2013 February 2013 Preferred Stock Offering [Member]	Dec. 31, 2013 February 2013 Preferred Stock Offering [Member]	May 30, 2013 May 2013 Common Stock Offering [Member]	Oct. 28, 2013 Reverse Stock Split [Member]	Oct. 28, 2013 Reverse Stock Split [Member]
Note 11 - Stockholders' Equity (Details) [Line Items]
Stock Issued During Period, Shares, New Issues					15,000.00422						3,603,604	1,195,927				1,392,109
Common Stock, Par or Stated Value Per Share (in Dollars per share)	$ 0.01		$ 0.01								$ 0.01
Class of Warrant or Right, Number of Securities Called by Warrants or Rights											1,801,802			1,341,382
Stock Issued During Period, Value, New Issues (in Dollars)											$ 15,000,000					$ 9,800,000
Common Stock, Shares Per Unit											1
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right									0.25	0.25
Share Price (in Dollars per share)											$ 4.1625
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share)			$ 8.18	$ 10.65							$ 4.10			$ 5.31
Common Stock Offering, Period of Restriction											9 months
Aggregate Offering Price (in Dollars)													25,000,000
Proceeds from Issuance of Common Stock (in Dollars)	13,788,811	15,628,099										6,800,000
Commission on Proceeds from ATM Shares, Percent												3.00%
Legal Fees (in Dollars)												50,000
Proceeds from Issuance or Sale of Equity (in Dollars)														15,000,000
Convertible Preferred Stock, Shares Issued upon Conversion								2,682,764
Warrants Issued Expiration Period														5 years
Warrants and Rights Outstanding (in Dollars)	398,044		3,026											5,400,000
Dividends Payable, Current (in Dollars)							$ 4,600,000
Conversion of Stock, Shares Issued															2,682,764
Conversion of Stock, Shares Converted						15,000.00422
Stockholders' Equity Note, Stock Split, Conversion Ratio																	4	4