Derivative Warrants - Additional Information (Details)	Aug. 07, 2017 warrant $ / shares	Mar. 31, 2019 $ / shares	Dec. 31, 2018 $ / shares
Equity [Abstract]
Plan of reorganization, number of warrants Issued \| warrant	118,137
Par value of successor common stock (USD per share)	$ 0.01
Exercise price of warrants (in USD per warrant)	$ 39.82	$ 39.82	$ 39.82
Expiration term (in years)	7 years

Exercise price per share or per unit of warrants or rights outstanding.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(4))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant