Share Repurchase Plan - Additional Information (Details) - USD ($)	Jul. 31, 2021	Dec. 03, 2020	Sep. 24, 2018
Treasury Stock Transactions [Abstract]
Share repurchase plan, authorized amount		$ 20,000,000	$ 10,000,000
Share repurchase plan, remaining authorized amount	$ 6,500,000

Amount remaining of a stock repurchase plan authorized.

No definition available.

Name:	us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant