Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Mar. 31, 2016	Dec. 31, 2015
Statement Of Financial Position [Abstract]
Preferred stock par value per share	$ 0.0001	$ 0.0001
Preferred stock shares authorized	10,000,000	10,000,000
Preferred stock shares issued	0	0
Preferred stock shares outstanding	0	0
Common stock par value per share	$ 0.0001	$ 0.0001
Common stock shares authorized	300,000,000	300,000,000
Common stock shares issued	64,559,772	63,587,833
Common stock shares outstanding	64,559,772	63,587,833