Subsequent Events	6 Months Ended
Jun. 30, 2013
Subsequent Events	9. Subsequent Events Warrant Exercises Subsequent to June 30, 2013, certain warrant holders exercised 9,900 warrants for cash and the Company received $26,235. Controlled Equity Offering Subsequent to June 30, 2013, the Company sold 770,508 shares of common stock under the Sales Agreement with Cantor, which resulted in net proceeds of approximately $2,081,938. (See Note 6). Aggregate gross sales for additional common stock of approximately $14,408,511 remain available under the Sales Agreement.

Subsequent Events

6 Months Ended

Jun. 30, 2013

9. Subsequent Events

Warrant Exercises

Subsequent to June 30, 2013, certain warrant holders exercised 9,900 warrants for cash and the Company received $26,235.

Controlled Equity Offering

Subsequent to June 30, 2013, the Company sold 770,508 shares of common stock under the Sales Agreement with Cantor, which resulted in net proceeds of approximately $2,081,938. (See Note 6). Aggregate gross sales for additional common stock of approximately $14,408,511 remain available under the Sales Agreement.