Stockholders' Equity - Additional Information (Details) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Equity [Abstract]
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares outstanding	0	0
Common stock, voting rights	Holders of the Company’s common stock are entitled to one vote per share.
Common stock, shares issued	28,330,460	27,150,674
Common stock, shares outstanding	28,330,460	27,150,674