Common Stock and Preferred Stock - Additional Information (Details) - $ / shares	12 Months Ended
	Dec. 31, 2018	Mar. 26, 2018	Dec. 31, 2017
Equity [Abstract]
Common stock, shares authorized	200,000,000		5,000
Common stock, par value	$ 0.001		$ 0.001
Common stock, shares issued	10,266,613		1,000
Common stock, shares outstanding	10,266,613		1,000
Spin-off transaction completed date	Mar. 26, 2018
Spin-off transaction record date	Mar. 19, 2018
Common stock shares distributed at spin-off		10,266,613
Preferred stock, shares authorized	10,000,000		0
Preferred stock, par value	$ 0.001		$ 0.001
Preferred stock, shares issued	0		0
Preferred stock, shares outstanding	0		0