From the 10K:

We issued warrants to TPL to acquire shares of our common stock. 1,400,000 warrants were exercisable upon issue; 700,000 warrants were exercisable when our common stock traded at $0.50 per share; an additional 700,000 warrants were exercisable when our common stock traded at $0.75 per share; and an additional 700,000 warrants were exercisable when our common stock traded at $1.00 per share. As of the date of this filing, all of the common stock trading prices have been met, causing TPL to be fully vested in all 3,500,000 of the above warrants.

Price triggers have been met so the warrants are exercisable (vested) but not yet exercised, is my interpretation. Hope this helps....