Emergence from Chapter 11 and Fresh Start Accounting - Summary of Fair Value of Warrants Valuation Assumptions (Details) - $ / shares	Dec. 31, 2016	Dec. 23, 2016
Fresh-Start Adjustment [Line Items]
Strike price (in dollars per share)		$ 55.25
Successor
Fresh-Start Adjustment [Line Items]
Share price (in dollars per share)	$ 15.94
Warrants Not Settleable in Cash \| Fair Value, Inputs, Level 2 \| Series A Warrants \| Successor
Fresh-Start Adjustment [Line Items]
Share price (in dollars per share)	14.66
Strike price (in dollars per share)	$ 55.25
Expected volatility	55.70%
Expected dividend rate	0.00%
Risk free interest rate	2.35%

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-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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Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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Risk-free interest rate assumption used in valuing an instrument.

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Price of a single share of a number of saleable stocks of a company.

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