Basis of Presentation and Significant Accounting Policies, Voluntary Reorganization under Chapter 11 Cases - Basis of Presentation and Significant Accounting Policies Narrative (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) segment	Dec. 31, 2018 USD ($)
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of operating segments | segment	1
Restricted cash | $	$ 1,000,000	$ 0
Minimum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of the assets	4 years
Maximum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of the assets	7 years