Stockholders' Equity

12 Months Ended

Dec. 31, 2014

Equity [Abstract]

Stockholders' Equity

11. Stockholders’ Equity

As of December 31, 2014 and 2013, the Company was authorized to issue two classes of stock: common stock and Series A Preferred Stock. Each share of Series A Preferred Stock was convertible, at the option of the holder thereof, into common stock on a one-for-one basis, subject to adjustment as defined in the Company’s amended and restated certificate of incorporation. The Company entered into a stockholders agreement in 2013 with certain stockholders. The agreement prevented those stockholders from transferring their shares without the consent of a majority of the stockholders.

On April 4, 2014, the Company completed the IPO in which it issued and sold 4,000,000 shares of common stock at a public offering price of $26.00 per share. The Company received net proceeds of $94.9 million after deducting underwriting discounts and commissions of $6.5 million and other offering expenses of approximately $2.6 million. Upon the closing of the IPO, the stockholder’s agreement ceased to be in effect.

On September 3, 2014, the Company completed a follow-on offering in which it issued and sold 1,250,000 shares of common stock at a public offering price of $40.25 per share. The Company received net proceeds of $47.6 million after deducting underwriting discounts and commissions of $1.9 million and other offering expenses of approximately $0.8 million. These expenses were recorded against the proceeds received from the follow-on offering.

Common Stock

Each holder of common stock will have one vote per share of common stock held on all matters that are submitted for stockholder vote. Upon liquidation, the common stock was junior to the rights and preferences of the Series A Preferred Stock as of December 31, 2013. At December 31, 2014 and 2013, there were 500,000,000 and 165,000,000 shares of common stock authorized, respectively. At December 31, 2014 and 2013, there were 81,905,325 and 53,757,437 shares of common stock issued and outstanding, respectively. The Company did not hold any shares as treasury shares as of December 31, 2014 and 2013.

Series A Preferred Stock

The Company was authorized to issue 25,000,000 shares of preferred stock as of December 31, 2014 and 2013. Upon the closing of the IPO on April 4, 2014, all shares of the Company’s then-outstanding convertible Series A Preferred Stock automatically converted on a one-for-one basis into an aggregate of 19,284,113 shares of common stock. There were no issued or outstanding shares of preferred stock as of December 31, 2014.

As of December 31, 2013, the 19,284,113 outstanding shares of Series A Preferred Stock had a liquidation preference of an amount per share equal to the original Series A Preferred Stock issue price of approximately $86.2 million.

Redeemable Common Stock

The put rights that would have required the Company to repurchase the Company’s then outstanding redeemable common stock at fair value (as defined in the stockholders agreement) determined at the redemption date were terminated and the shares converted on a one-for-one basis into an aggregate of 1,344,236 shares of common stock upon the closing of the IPO on April 4, 2014.

As of December 31, 2013, there were 1,344,236 shares of common stock with put rights. As the redemption price was equivalent to the fair value of the instrument, the Company adjusted the carrying value of the redeemable common stock to its fair value with an adjustment to equity. The fair value of the redeemable common stock was $18.4 million at December 31, 2013. The Company had an annual redemption limit of $4.0 million.