Note 5 - Shareholders' Equity (Details) (USD $)	1 Months Ended		6 Months Ended	12 Months Ended		0 Months Ended	1 Months Ended
	Jul. 31, 2012	Jan. 30, 2009	Jun. 30, 2013	Dec. 31, 2012	Jun. 14, 2013	Jun. 14, 2013 Series A Preferred Stock [Member]	Jun. 28, 2012 Series A Preferred Stock [Member]	Jan. 30, 2009 Series A Preferred Stock [Member]
Note 5 - Shareholders' Equity (Details) [Line Items]
Preferred Stock, Shares Issued			0	17,000				33,000
Preferred Stock, Par or Stated Value Per Share (in Dollars per share)			$ 0	$ 0				$ 0
Preferred Stock, Liquidation Preference, Value (in Dollars)								$ 1,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights		578,947			578,947
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)		8.55			8.55
Proceeds from Issuance or Sale of Equity (in Dollars)		33,000,000
Proceeds from Issuance of Convertible Preferred Stock (in Dollars)								32,700,000
Proceeds from Issuance of Warrants (in Dollars)		300,000
Fair Value Assumptions, Expected Term								10 years
Preferred Stock, Dividend Rate, Percentage								5.00%
Stock Repurchased and Retired During Period, Shares			17,000	16,000		17,000	16,000
Preferred Stock, Redemption Price Per Share (in Dollars per share)							$ 941.01
Payments for Repurchase of Convertible Preferred Stock (in Dollars)	$ 1,946,670						$ 15,100,000
Preferred Stock, Shares Outstanding			0	17,000			17,000