Note 4 - Equity, Stock Plan and Warrants (Details) (USD $)	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Note 4 - Equity, Stock Plan and Warrants (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	381,718
Stock Issued During Period, Shares, New Issues	1,374,250
Proceeds from Issuance of Common Stock (in Dollars)	$ 41,219,893	$ 0
Payments of Stock Issuance Costs (in Dollars)	2,800,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	3,100,001
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	425,338
Share-based Compensation (in Dollars)	1,461,804	1,234,705
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars)	6,100,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year 113 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares	400,000
Class of Warrant or Rights, Weighted Average Exercise Price, Outstanding (in Dollars per share)	$ 7.26
January 15, 2013 Restricted Stock Award [Member]
Note 4 - Equity, Stock Plan and Warrants (Details) [Line Items]
Stock Issued During Period, Shares, Restricted Stock Award, Gross	38,000
April, 26, 2013 Restricted Stock Award [Member]
Note 4 - Equity, Stock Plan and Warrants (Details) [Line Items]
Stock Issued During Period, Shares, Restricted Stock Award, Gross	181,400
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights	106,900 of these shares vest in increments as follows: 1/3 rd on March 1, 2014, 1/3 rd on March 1, 2015 and 1/3 rd on March 1, 2016.The remaining 74,500 shares of restricted common stock vest according to certain financial performance criteria.
Exercise of Warrants [Member]
Note 4 - Equity, Stock Plan and Warrants (Details) [Line Items]
Stock Issued During Period, Shares, Other	27,622
Cashless Exercise of Warrants [Member]
Note 4 - Equity, Stock Plan and Warrants (Details) [Line Items]
Stock Issued During Period, Shares, Other	399,629
Selling, General and Administrative Expenses [Member]
Note 4 - Equity, Stock Plan and Warrants (Details) [Line Items]
Share-based Compensation (in Dollars)	700,000	600,000
Research and Development Expense [Member]
Note 4 - Equity, Stock Plan and Warrants (Details) [Line Items]
Share-based Compensation (in Dollars)	$ 800,000	$ 600,000