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Income Taxes - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2014
Income Tax Disclosure [Abstract] |  |  |
Statutory federal income tax rate | 35.00% | 35.00% | 35.00%
Federal Tax Authority |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Federal and State Income tax net operating loss carryforward | $ 14.8 |  |
Federal Tax Authority | Expire in 2024 |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Federal and State Income tax net operating loss carryforward | 4.2 |  |
Federal Tax Authority | Expire in 2025 |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Federal and State Income tax net operating loss carryforward | 10.6 |  |
State Tax Authority |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Federal and State Income tax net operating loss carryforward | 18.3 |  |
State Tax Authority | Expire in 2024 |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Federal and State Income tax net operating loss carryforward | 4.2 |  |
State Tax Authority | Expire in 2025 |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Federal and State Income tax net operating loss carryforward | 14.1 |  |
Federal and State Tax Authority |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Federal and State capital loss carryforward | 25.2 |  |
Federal and State Tax Authority | Expire in 2017 |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Federal and State capital loss carryforward | 0.6 |  |
Federal and State Tax Authority | Expire in 2018 |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Federal and State capital loss carryforward | $ 24.6 |  |

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