Stockholders' Equity - Additional Information (Detail) - $ / shares	Mar. 31, 2019	Dec. 31, 2018
Temporary equity, shares outstanding	21,810,992	0
Preferred Stock, per share	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common Class A [Member]
Common Stock, per share	$ 0.0001	$ 0.0001
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares, issued	1,189,008	0
Common stock, shares, outstanding	1,189,008	0
Common Class B [Member]
Common Stock, per share	$ 0.0001	$ 0.0001
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares, issued	5,750,000	5,750,000
Common stock, shares, outstanding	5,750,000	5,750,000