Retirement Plan - Additional Information (Detail) - USD ($) $ in Thousands	5 Months Ended	7 Months Ended	12 Months Ended
	Dec. 31, 2018	Aug. 13, 2018	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Matching contributions to the plan	$ 252	$ 508	$ 1,261	$ 1,041