Consolidated Statements of Income (Parenthetical)	Apr. 30, 2021
Income Statement [Abstract]
Stockholders equity reverse stock split	3-for-2
Stockholders equity note reverse stocks split conversion ratio	1.5

Description of the reverse stock split arrangement. Also provide the retroactive effect given by the reverse split that occurs after the balance sheet date but before the release of financial statements.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 4.C)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187143-122770

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration