Stockholders' Equity - Additional Information (Details) - $ / shares	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
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, shares authorized	100,000,000	100,000,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, voting rights	Holders of common stock are entitled to one vote per share
Common stock, shares issued	29,625,465	28,330,460
Common stock, shares outstanding	29,625,465	28,330,460