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Equity and Stock-based Compensation Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Nov. 29, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Sep. 30, 2018
Class of Stock [Line Items] |  |  |  |  |  |
Share-based compensation expense |  | $ 100 | $ 200 | $ 474 | $ 632 |
Stock-based compensation expense |  | $ 108 |  |  |  |
Authorized stock repurchase amount | $ 4,000 |  |  |  |  |
Common stock, par value (USD per share) | $ 0.01 | $ 0.01 |  | $ 0.01 |  | $ 0.01
Stock repurchase program period | 1 year |  |  |  |  |
Shares repurchased (in shares) |  | 0 |  |  |  |
Stock Options |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Accelerated vesting of options (in shares) |  | 12,500 |  |  |  |
Options subject to modification (in shares) |  | 122,500 |  |  |  |

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