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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Sep. 30, 2016
Accounting Policies [Abstract] |
Supplemental Disclosures of Cash Flow Information | Supplemental Disclosures of Cash Flow Information (in thousands):
| Year Ended September 30,
| 2016 |  |  | 2015 |  |  | 2014 |
Cash paid (received) during the period for: |  |  |  |  |  |  |  |  |  |  |
Interest, net of interest income | $ | 4 |  |  | $ | 70 |  |  | $ | 149 |
Income taxes, net of refunds |  | (352) |  |  |  | 2,298 |  |  |  | 18,889 |
Non-cash capital expenditures |  | 221 |  |  |  | 147 |  |  |  | 13,527 |

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- Definition Tabular disclosure of supplemental cash flow information for the periods presented. + References No definition available. + Details
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