Stockholders' Equity

3 Months Ended

Mar. 31, 2015

Stockholders' Equity

Stockholders' Equity

(9)  Stockholders’ Equity

During the three months ended March 31, 2015, the Company issued 8,337,500 shares of its common stock in an underwritten public offering resulting in net proceeds to the Company of $188.8 million, after deducting underwriting fees and offering expenses.