Income Taxes (Schedule of Effective Income Rate Reconciliation) (Details) - USD ($) $ in Thousands	5 Months Ended	7 Months Ended	12 Months Ended
	May 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Loss Carryforwards [Line Items]
Tax expense at statutory rate		$ (5,050)
State income taxes, net of federal tax benefit		(62)
Changes in valuation allowance		4,999
Other		35
Total income tax expense		$ (78)
Predecessor
Operating Loss Carryforwards [Line Items]
Total income tax expense	$ (166)		$ 210	$ 2,375