Note 9 - Stockholders' Equity (Details) (USD $)	0 Months Ended				1 Months Ended					9 Months Ended						1 Months Ended	12 Months Ended		9 Months Ended	0 Months Ended	9 Months Ended
	Jun. 03, 2013	May 30, 2013	Feb. 26, 2013	Aug. 08, 2011	Jun. 03, 2013	Feb. 25, 2013	Feb. 28, 2013	Aug. 31, 2011	Jan. 31, 2011	Sep. 30, 2013	Oct. 27, 2013	Dec. 31, 2012	Oct. 28, 2013 Subsequent Event [Member]	Sep. 30, 2013 Subsequent Event [Member]	Sep. 30, 2013 Before Reverse Stock Split [Member]	Jan. 31, 2011 Beneficial Conversion Feature Associated with January 2011 Preferred Stock Offering Was Not Recorded At Issuance [Member]	Dec. 31, 2011 Amortization of Beneficial Conversion Feature Associated with January 2011 Preferred Stock Offering Was Not Recorded in 2011 [Member]	Dec. 31, 2011 2011 Net Loss Was Understated [Member]	Sep. 30, 2013 Convertible Common Stock [Member]	Feb. 22, 2013 Series A Convertible Preferred Stock (Member)	Sep. 30, 2013 Series A Convertible Preferred Stock (Member)	Sep. 30, 2013 Redeemable Convertible Preferred Stock [Member]	Jan. 31, 2011 Redeemable Convertible Preferred Stock [Member]	Sep. 30, 2013 Maximum [Member]
Note 9 - Stockholders' Equity (Details) [Line Items]
Proceeds from Issuance or Sale of Equity (in Dollars)			$ 15,000,000							$ 400,000
Stock Issued During Period, Shares, New Issues		1,392,109				1,195,927													137,032	15,000.00422	15,000.00422
Aggregate Offering Price (in Dollars)							25,000,000
Proceeds from Issuance of Common Stock (in Dollars)						6,800,000				15,628,099
Commission on Proceeds from ATM Shares, Percent						3.00%
Legal Fees (in Dollars)						50,000
Preferred Stock, Dividend Rate, Percentage																				0.00%		8.00%
Convertible Preferred Stock, Shares Reserved for Future Issuance			2,682,764
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)			1,341,382							13,800,000			3,100,000											463,000,000,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)			5.31							10.89		15.17
Warrants and Rights Outstanding (in Dollars)			5,400,000
Dividends Payable, Current (in Dollars)			4,600,000
Conversion of Stock, Shares Converted								5,000		2,682,764
Stock Issued During Period, Value, New Issues (in Dollars)		9,800,000
Class of Warrant or Right, Outstanding (in Shares)		1,398,816								3,073,027		1,747,478
Common Stock, Shares Authorized		75,000,000								75,000,000		75,000,000
Reclassification From Equity to Liability (in Dollars)	9,100,000				9,100,000
Proceeds from Issuance of Redeemable Convertible Preferred Stock (in Dollars)									5,100,000	13,616,442
Temporary Equity, Shares Issued																							5,000
Preferred Stock, Par or Stated Value Per Share (in Dollars per share)										$ 0.01		$ 0.01										$ 1,000
Convertible Preferred Stock, Shares Issued upon Conversion																						92.5926
Immaterial Prior Period Error (in Dollars)																5,000,000	5,000,000	5,000,000
Conversion of Stock, Shares Issued				462,960
Reverse Stock Split, Number of Shares Outstanding Consolidated into Each Share (in Dollars)													$ 4.5
Common Stock, Shares, Outstanding										13,604,975	61,226,873	8,289,507	13,604,975	61,226,873
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number										865,609		725,529	900,000		3,900,000