Bankruptcy Related Disclosures - Narrative (Details) - USD ($) $ / shares in Units, shares in Thousands		3 Months Ended		6 Months Ended
	Aug. 31, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Schedule of Reorganization Items, Net [Line Items]
Proceeds from issuance of debt				$ 39,461,000
Reorganization shares issued to debt holders (in shares)	2,000
Par value of reorganization shares (in dollars per share)	$ 0.01
Put option fee	$ 2,000,000
Reorganization items		$ 0		$ 0
Common Stock
Schedule of Reorganization Items, Net [Line Items]
Reorganization shares issued to debt holders (in shares)	400
11.0% Senior Secured Term Loan Credit Facilities due September 14, 2018
Schedule of Reorganization Items, Net [Line Items]
Stated interest rate (as a percent)	11.00%
12.75% Senior Secured Notes due December 15, 2018
Schedule of Reorganization Items, Net [Line Items]
Stated interest rate (as a percent)	12.75%
5.25% Convertible Notes due December 30, 2019
Schedule of Reorganization Items, Net [Line Items]
Stated interest rate (as a percent)	5.25%
Cash received from initial draw on New ABL Facility | Line of Credit
Schedule of Reorganization Items, Net [Line Items]
Line of credit capacity	$ 125,000,000
Proceeds from line of credit	78,797,000
New Money Notes | Senior Notes
Schedule of Reorganization Items, Net [Line Items]
Proceeds from issuance of debt	38,002,000
Aggregate principal amount	47,502,000
Second Lien Notes | Senior Notes
Schedule of Reorganization Items, Net [Line Items]
Aggregate principal amount	$ 162,502,000
Second Lien Notes | Minimum | Senior Notes
Schedule of Reorganization Items, Net [Line Items]
Stated interest rate (as a percent)	5.00%
Second Lien Notes | Maximum | Senior Notes
Schedule of Reorganization Items, Net [Line Items]
Stated interest rate (as a percent)	7.00%
Prepetition Second Lien Secured Claims | Senior Notes
Schedule of Reorganization Items, Net [Line Items]
Aggregate principal amount	$ 111,875,000
Repayments of debt	$ 6,646,000
Prepetition Second Lien Secured Claims | Secured Debt
Schedule of Reorganization Items, Net [Line Items]
Reorganization shares issued to debt holders (in shares)	1,300
Prepetition Third Lien Secured Claims | Senior Notes
Schedule of Reorganization Items, Net [Line Items]
Aggregate principal amount	$ 3,125,000
Prepetition Third Lien Secured Claims | Secured Debt
Schedule of Reorganization Items, Net [Line Items]
Reorganization shares issued to debt holders (in shares)	300
Predecessor
Schedule of Reorganization Items, Net [Line Items]
Proceeds from issuance of debt					$ 12,500,000
Reorganization items			$ 5,502,000		5,502,000
Legal and professional fees			652,000		652,000
Write off of debt issuance costs			$ 4,850,000		$ 4,850,000