Inventories - Narrative (Details) - USD ($) |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
Sep. 30, 2020 |
Sep. 30, 2019 |
|
| Inventory Disclosure [Abstract] | ||||
| Proceeds from federal relief grants | $ 4,136,000 | $ 4,466,000 | $ 4,629,000 | $ 15,597,000 |
| X | ||||||||||
- Definition Proceeds From Federal Relief Grants No definition available.
|
| X | ||||||||||
- References No definition available.
|