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Commitments and Contingencies - Narrative (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Sep. 30, 2020 USD ($) press | Sep. 30, 2019 USD ($) | Jul. 31, 2020 press
Loss Contingencies [Line Items] |  |  |
Impairment charges offset by insurance proceeds |  | $ 1,107 |
Quality Aluminum Forge, LLC Manufacturing Facility Fire |  |  |
Loss Contingencies [Line Items] |  |  |
Number of presses brought into service | press |  |  | 2
Number of presses on site in production | press | 6 |  |
Number of presses on site | press | 8 |  |
Proceeds recognized | $ 8,974 |  |
Insurance proceeds recorded | 7,427 | 11,986 |
Cash proceeds | 10,927 | 8,486 |
Business interruption | 1,219 | 1,168 |
Quality Aluminum Forge, LLC Manufacturing Facility Fire | Buildings |  |  |
Loss Contingencies [Line Items] |  |  |
Capital expenditures (equipment) | $ 713 | 2,878 |
Quality Aluminum Forge, LLC Manufacturing Facility Fire | Damage from Fire, Explosion or Other Hazard |  |  |
Loss Contingencies [Line Items] |  |  |
Number of additional presses to be restored | press | 2 |  |
Number of presses damaged | press | 6 |  |
Class Action Suit in Superior Court of California, Orange County - Wage-and-hour law violations |  |  |
Loss Contingencies [Line Items] |  |  |
Estimated loss on class action lawsuit | $ 65 | $ 250 |

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