Common stock

3 Months Ended

Mar. 31, 2014

Common stock

Common stock

6. Common stock

In March 2014, we issued and sold in a public offering an aggregate of 5,518,630 shares of our common stock at $10.00 per share, which included 518,630 shares that represented the partial exercise of an overallotment option granted to the underwriters in connection with the offering. The shares included in our offering were registered under the Securities Act pursuant to our registration statement filed with the Securities and Exchange Commission on Form S-3 (File No. 333-190939), which was filed with the SEC on August 30, 2013. The offering resulted in $51.7 million of net proceeds, after deducting underwriting discounts and commissions and other offering expenses payable by us.

In March 2013, we issued and sold in a private placement an aggregate of 3,888,880 shares of our common stock to investors at $9.00 per share. The private placement resulted in $32.7 million of net proceeds. We filed a registration statement covering the resale of all such shares.