Bankruptcy Related Disclosures - Reorganization Adjustments, Schedule of Liabilities Subject to Compromise (Details) $ in Thousands	Aug. 31, 2017 USD ($)
Schedule of Liabilities Subject to Compromise [Line Items]
Liabilities subject to compromise	$ 211,363
12.75% Senior Secured Notes due December 15, 2018
Schedule of Liabilities Subject to Compromise [Line Items]
Liabilities subject to compromise	177,019
5.25% Convertible Notes due December 30, 2019
Schedule of Liabilities Subject to Compromise [Line Items]
Liabilities subject to compromise	22,323
Accrued Interest Payable
Schedule of Liabilities Subject to Compromise [Line Items]
Liabilities subject to compromise	12,021
Payment of cash recovery to prepetition Second Lien Noteholders
Schedule of Liabilities Subject to Compromise [Line Items]
Repayments of debt	(6,646)
Second Lien Notes
Schedule of Liabilities Subject to Compromise [Line Items]
New equity issued to prepetition Second and Third Lien Noteholders	(110,200)
Prepetition Second and Third Lien Noteholders
Schedule of Liabilities Subject to Compromise [Line Items]
New equity issued to prepetition Second and Third Lien Noteholders	$ (4,528)