Financings	6 Months Ended
Jun. 30, 2017
Text Block [Abstract]
Financings	2. Financings On May 11, 2017, the Company sold in an underwritten public offering an aggregate of 9,708,738 shares of its common stock. The price to the public in the offering was $5.15 per share, and the underwriters agreed to purchase the shares from the Company pursuant to the underwriting agreement at a purchase price of $4.893 per share. The offering was made pursuant to the Company’s effective registration statement on Form S-3ASR (Registration Statement No. 333-201826) previously filed with the SEC, and a prospectus supplement thereunder. The net proceeds from the offering were approximately $47.3 million after deducting underwriting discounts and estimated offering expenses payable by the Company.

2. Financings

On May 11, 2017, the Company sold in an underwritten public offering an aggregate of 9,708,738 shares of its common stock. The price to the public in the offering was $5.15 per share, and the underwriters agreed to purchase the shares from the Company pursuant to the underwriting agreement at a purchase price of $4.893 per share. The offering was made pursuant to the Company’s effective registration statement on Form S-3ASR (Registration Statement No. 333-201826) previously filed with the SEC, and a prospectus supplement thereunder. The net proceeds from the offering were approximately $47.3 million after deducting underwriting discounts and estimated offering expenses payable by the Company.