Leases - Supplemental Cash Flow Information Related to Leases (Parenthetical) (Details) $ in Millions	Jul. 31, 2021 USD ($)
Leases [Abstract]
Prepaid rent	$ 3.8

Amount of asset related to consideration paid in advance for rent that provides economic benefits within a future period of one year or the normal operating cycle, if longer.

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Name:	us-gaap_PrepaidRent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant