Consolidated Statements of Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
Jul. 31, 2021	Jul. 31, 2020
Income Statement [Abstract]
Stock-based compensation included in selling, general and administrative expenses	$ 1,490	$ 3,856

Amount of noncash expense for share-based payment arrangement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

Name:	us-gaap_ShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration