Note 9 - Preferred Stock and Common Stock Warrants (Details) (USD $)	0 Months Ended			1 Months Ended	9 Months Ended					0 Months Ended	1 Months Ended		0 Months Ended
	Mar. 07, 2014	May 15, 2013	Jun. 13, 2012	Jan. 30, 2009	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	May 08, 2013	Apr. 15, 2013	Apr. 03, 2014 Series A Preferred Stock [Member]	Jan. 30, 2009 Series A Preferred Stock [Member]	Mar. 07, 2014 Series A Preferred Stock [Member]	Mar. 07, 2014 Underwritten Offering [Member] Common Stock [Member]	Mar. 07, 2014 Underwritten Offering [Member]	Mar. 07, 2014 Over-Allotment Option [Member] Common Stock [Member]
Note 9 - Preferred Stock and Common Stock Warrants (Details) [Line Items]
Stock Issued During Period, Shares, New Issues (in Shares)											17,000		1,499,999		195,652
Warrant Term				10 years
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)				459,459
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share)				$ 5.55
Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants				$ 17,000,000
Preferred Stock, Redemption Amount			5,000,000
Preferred Stock, Amount of Preferred Dividends in Arrears			19,444
Treasury Stock, Value					38,134,189		61,225,185		12,000
Warrants and Rights Outstanding								2,003,250
Payments for Repurchase of Warrants		2,003,250				2,003,250
Stock Redeemed or Called During Period, Value					12,000,000					12,000,000
Preferred Stock, Dividend Rate, Percentage						5.00%				9.00%
Proceeds from Issuance of Common Stock	$ 15,800,000				$ 15,814,312									$ 17,200,000
Share Price (in Dollars per share)															$ 11.50
Treasury Stock, Shares (in Shares)					2,523,055		4,051,248					12,000