Subsequent Events	6 Months Ended
Jun. 30, 2012
Subsequent Events [Abstract]
Subsequent Events	(11) Subsequent Events On July 5, 2012, the Company closed its IPO of 13,397,500 shares of common stock at an offering price of $18.00 per share. The offering included 10,350,000 shares sold and issued by the Company and 3,047,500 shares sold by the Company’s founder. The shares sold in the offering included 1,350,000 shares and 397,500 shares sold by the Company and its founder, respectively, pursuant to the underwriters’ full exercise of their over-allotment option. The net proceeds to the Company from the offering were approximately $173.3 million after deducting underwriting discounts and commissions, and before deducting total estimated expenses in connection with the offering of $3.3 million. Upon the closing of the initial public offering, all of the Company’s outstanding 10,462,877 shares of convertible preferred stock converted into an aggregate of 83,703,016 shares of its common stock. Additionally, on July 5, 2012, the Company filed its Restated Certificate of Incorporation increasing the number of shares the Company is authorized to issue to 600,000,000 shares of common stock and 10,000,000 shares of preferred stock.

Subsequent Events

6 Months Ended

Jun. 30, 2012

(11) Subsequent Events

On July 5, 2012, the Company closed its IPO of 13,397,500 shares of common stock at an offering price of $18.00 per share. The offering included 10,350,000 shares sold and issued by the Company and 3,047,500 shares sold by the Company’s founder. The shares sold in the offering included 1,350,000 shares and 397,500 shares sold by the Company and its founder, respectively, pursuant to the underwriters’ full exercise of their over-allotment option. The net proceeds to the Company from the offering were approximately $173.3 million after deducting underwriting discounts and commissions, and before deducting total estimated expenses in connection with the offering of $3.3 million. Upon the closing of the initial public offering, all of the Company’s outstanding 10,462,877 shares of convertible preferred stock converted into an aggregate of 83,703,016 shares of its common stock.

Additionally, on July 5, 2012, the Company filed its Restated Certificate of Incorporation increasing the number of shares the Company is authorized to issue to 600,000,000 shares of common stock and 10,000,000 shares of preferred stock.