Fair Value Measurements Fair Value Measurements (Details) - USD ($)	Mar. 31, 2019	Sep. 30, 2018	Mar. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, Long-term and Short-term, Combined Amount	$ 476,455,000	$ 484,859,000
Warrant liability fair value	4,479,000	1,726,000	$ 16,930,000
Senior Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt, Fair Value	392,311,150
Debt, Long-term and Short-term, Combined Amount	385,000,000	385,000,000
New Second Lien Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt, Long-term and Short-term, Combined Amount	91,455,000	$ 93,556,000
2nd Lien Agreement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt, Fair Value	$ 91,455,213