Note 5 - Warrants

3 Months Ended

Mar. 31, 2013

Derivative Instruments and Hedging Activities Disclosure [Text Block]

5. Warrants

The Company has issued warrants to investors, et al., with exercise prices ranging from $1.60 to $5.00.  The warrants expire between one and seven years from the date of grant, subject to the terms applicable in the agreement.  As of March 31, 2013, the Company had warrants outstanding that are exercisable into 10,377,995 shares of common stock, with a weighted average exercise price of $2.76 per share. There was no warrant activity during the quarter ended March 31, 2013.