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Leases (Details) - Schedule of lease term and discount rate
Apr. 30, 2021
Weighted-average remaining lease term (years):  
Weighted-average remaining lease term: Operating leases 5 years 292 days
Weighted-average remaining lease term: Finance leases 2 years 255 days
Weighted-average discount rate:  
Weighted-average discount rate: Operating leases 4.97%
Weighted-average discount rate: Finance leases 8.25%