Summary of Significant Accounting Policies - Earnings Per Share (Details) - shares |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2016 |
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| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
| Employee stock options granted (in shares) | 0 | 300,000 | 750,000 | 0 |
| Anti-dilutive equity awards (in shares) | 0 | |||
| Employee Stock Option | ||||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
| Employee stock options granted (in shares) | 300,000 | 750,000 | ||
| X | ||||||||||
- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Definition Gross number of share options (or share units) granted during the period. No definition available.
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- Details
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