Voluntary Reorganization Under Chapter 11 (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	May 22, 2020
Debt Instrument [Line Items]
Amount of principal outstanding held by certain lenders			75.00%
Credit bid, as a percent of pre-petition claims			100.00%
Debtor-in-possession financing, amount arranged					$ 30,000,000.0
Bankruptcy claims, payments for operating activities			$ 800,000
Bankruptcy claims, payments for financing activities			2,000,000.0
Net (Loss)	$ (68,662,000)	$ (111,599,000)	$ (325,389,000)	$ (193,780,000)
DIP Credit Agreement
Debt Instrument [Line Items]
Debtor-in-possession financing, amount to be available upon court approval					$ 10,000,000.0