Commitments and Contingencies - Additional Information (Detail) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) $ / shares
Deferred underwriting discount | $ / shares	$ 0.35
Deferred underwriting discount, aggregate | $	$ 20,700
IPO [Member]
Underwriting discount | $ / shares	$ 0.20
Underwriting discounts, aggregate | $	$ 11,850