Income Taxes - Components of Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	4 Months Ended	8 Months Ended	12 Months Ended
	May 04, 2017	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Current taxes:
Federal		$ 4	$ 0	$ 0
State		(34)	50	0
Total current income tax benefit (expense)		(30)	50	0
Deferred taxes:
Federal		1,933	0	0
State		273	0	0
Total deferred income tax benefit (expense)		2,206	0	0
Total income tax benefit (expense)		$ 2,176	$ 50	$ 0
Predecessor [Member]
Current taxes:
Federal	$ 0
State	17
Total current income tax benefit (expense)	17
Deferred taxes:
Federal	71
State	3
Total deferred income tax benefit (expense)	74
Total income tax benefit (expense)	$ 91