Note 9 - Preferred Stock and Common Stock Warrants (Details) (USD $)	0 Months Ended			1 Months Ended	3 Months Ended
	Mar. 07, 2014	May 15, 2013	Jun. 13, 2012	Jan. 30, 2009	Mar. 31, 2014	Feb. 02, 2014	Dec. 31, 2013	May 08, 2013	Apr. 15, 2013
Note 9 - Preferred Stock and Common Stock Warrants (Details) [Line Items]
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 Item)				5.55
Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants				$ 17,000,000
Preferred Stock, Liquidation Preference Per Share (in Dollars per share)						$ 1,000
Preferred Stock, Redemption Amount			5,000,000
Preferred Stock, Amount of Preferred Dividends in Arrears			19,444
Preferred Stock, Redemption Price Per Share (in Dollars per share)			$ 1,000
Treasury Stock, Value					38,182,888		61,225,185		12,000
Warrants and Rights Outstanding								2,003,250
Payments for Repurchase of Warrants		2,003,250
Proceeds from Issuance of Common Stock	15,900,000				15,882,974
Treasury Stock, Shares (in Shares)					2,526,278		4,051,248
Underwritten Offering [Member] | Common Stock [Member]
Note 9 - Preferred Stock and Common Stock Warrants (Details) [Line Items]
Stock Issued During Period, Shares, New Issues (in Shares)	1,499,999
Underwritten Offering [Member]
Note 9 - Preferred Stock and Common Stock Warrants (Details) [Line Items]
Proceeds from Issuance of Common Stock	$ 17,200,000
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)	195,652
Share Price (in Dollars per share)	$ 11.50
Series A Preferred Stock [Member]
Note 9 - Preferred Stock and Common Stock Warrants (Details) [Line Items]
Stock Issued During Period, Shares, New Issues (in Shares)				17,000
Treasury Stock, Shares (in Shares)	12,000
First Five Years [Member]
Note 9 - Preferred Stock and Common Stock Warrants (Details) [Line Items]
Preferred Stock, Dividend Rate, Percentage				5.00%
After Five Years [Member]
Note 9 - Preferred Stock and Common Stock Warrants (Details) [Line Items]
Preferred Stock, Dividend Rate, Percentage				9.00%