Background, Description of Business, and Basis of Presentation - Additional Information (Details)	3 Months Ended		12 Months Ended
	Jul. 31, 2021 USD ($) Customer	Jul. 31, 2020 USD ($) Customer	Apr. 30, 2021 USD ($)
Background Description Of Business And Basis Of Presentation [Line Items]
Corporate expenses		$ 2,100,000
Distribution expenses		1,600,000
Related party sales		1,500,000
Accounts receivable	$ 33,525,000		$ 37,487,000
Impact on previously reported net income or comprehensive income			0
Net sales	$ 60,768,000	$ 50,468,000
Sales Revenue Net | Customer Concentration Risk
Background Description Of Business And Basis Of Presentation [Line Items]
Number of customer | Customer	1	1
Sales Revenue Net | Customer Concentration Risk | Customer One
Background Description Of Business And Basis Of Presentation [Line Items]
Net sales	$ 11,000,000.0	$ 19,200,000
Concentration risk, percentage	18.10%	38.10%
Accounts Receivable | Credit Concentration Risk
Background Description Of Business And Basis Of Presentation [Line Items]
Number of customer | Customer	2	1
Accounts Receivable | Credit Concentration Risk | Customer One
Background Description Of Business And Basis Of Presentation [Line Items]
Accounts receivable	$ 9,400,000	$ 20,400,000
Concentration risk, percentage	27.90%	48.10%
Accounts Receivable | Credit Concentration Risk | Customer Two
Background Description Of Business And Basis Of Presentation [Line Items]
Accounts receivable	$ 3,800,000
Concentration risk, percentage	11.40%
Minimum
Background Description Of Business And Basis Of Presentation [Line Items]
Product shipment days	20 days
Maximum
Background Description Of Business And Basis Of Presentation [Line Items]
Product shipment days	90 days
Adjustment
Background Description Of Business And Basis Of Presentation [Line Items]
Other assets, current			4,800,000
Accounts receivable			$ (4,800,000)
Net Sales | Smith & Wesson Brands, Inc.
Background Description Of Business And Basis Of Presentation [Line Items]
Related party sales		$ 1,500,000