Common Stock	6 Months Ended
Jun. 30, 2015
Equity [Abstract]
Common Stock	Note 9. Common Stock In April 2015, we raised gross proceeds of approximately $25 million through a public offering of 35,715,000 Units. Each Unit consists of one share of our common stock and a warrant to purchase three-quarters of a share of our common stock. The warrants have an exercise price of $0.85 per share, are exercisable immediately, and will expire five years from the date of issuance. We also granted the underwriters a thirty day option (the Over-Allotment Option) to purchase up to an additional 5,357,250 shares of common stock and/or warrants to purchase up to an additional 4,017,938 shares of common stock to cover over-allotments, if any. The underwriters exercised the over-allotment option for the warrants and so, in April 2015, we issued warrants to purchase up to an additional 4,017,938 shares of common stock at $0.85 per share. In May 2015, the underwriters exercised in part, the over-allotment option for additional shares and purchased 2,757,250 shares of our common stock at a price of $0.699 per share, before the underwriting discount. We received net proceeds of approximately $1.8 million from the exercise of the Over-Allotment Option, increasing our aggregate net proceeds from the offering to approximately $25 million, after deducting offering expenses, underwriting discounts and commissions. The shares were offered under our effective shelf registration statement previously filed with the SEC.

Common Stock

6 Months Ended

Jun. 30, 2015

Note 9. Common Stock

In April 2015, we raised gross proceeds of approximately $25 million through a public offering of 35,715,000 Units. Each Unit consists of one share of our common stock and a warrant to purchase three-quarters of a share of our common stock. The warrants have an exercise price of $0.85 per share, are exercisable immediately, and will expire five years from the date of issuance. We also granted the underwriters a thirty day option (the Over-Allotment Option) to purchase up to an additional 5,357,250 shares of common stock and/or warrants to purchase up to an additional 4,017,938 shares of common stock to cover over-allotments, if any. The underwriters exercised the over-allotment option for the warrants and so, in April 2015, we issued warrants to purchase up to an additional 4,017,938 shares of common stock at $0.85 per share. In May 2015, the underwriters exercised in part, the over-allotment option for additional shares and purchased 2,757,250 shares of our common stock at a price of $0.699 per share, before the underwriting discount. We received net proceeds of approximately $1.8 million from the exercise of the Over-Allotment Option, increasing our aggregate net proceeds from the offering to approximately $25 million, after deducting offering expenses, underwriting discounts and commissions. The shares were offered under our effective shelf registration statement previously filed with the SEC.