Capital Stock - Additional Information (Details) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
Equity [Abstract]
Common stock, shares authorized	450,000,000	450,000,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares issued	7,692,624	7,619,469
Common stock, shares outstanding	7,692,624	7,619,469
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares issued (in series)	0