Leases - Weighted average remaining operating lease term and incremental borrowing rate (Details) |
Sep. 26, 2020 |
Sep. 28, 2019 |
|---|---|---|
| Leases | ||
| Weighted average remaining lease term (years) | 7 years | 7 years 2 months 12 days |
| Weighted average incremental borrowing rate | 14.00% | 8.70% |