Stockholders' Equity of the Company - (Details Textual) - $ / shares	Dec. 31, 2017	Dec. 31, 2016
Common stock, shares authorized (in shares)	300,000,000	300,000,000
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Capital Stock
Common stock, shares authorized (in shares)	450,000,000
Common Stock | Initial public offering
Common stock, shares authorized (in shares)	300,000,000
Class A Common Stock
Common stock, shares authorized (in shares)	140,000,000
Preferred Stock
Preferred stock (in shares)	10,000,000
Series B Preferred Stock
Preferred stock (in shares)	3,000,000