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Significant Accounting Policies - Additional Information (Detail)
 12 Months Ended
Apr. 30, 2021
USD ($)
Customer
Apr. 30, 2020
USD ($)
Customer
Apr. 30, 2019
USD ($)
Customer
Feb. 01, 2021
USD ($)
May 01, 2019
USD ($)
Product Information [Line Items]          
Maximum maturity period of all highly liquid investments to be considered cash equivalents 3 months        
Goodwill $ 19,024,000 $ 19,024,000   $ 19,000,000.0  
Remaining estimated cost related to recalls, safety alerts, and consumer advisories 323,000        
Warranty expense 5,200,000 1,800,000 $ 2,700,000    
Promotional programs amount 10,500,000 43,600,000 39,200,000    
Selling and marketing expenses 15,200,000 9,200,000 8,000,000.0    
Right-of-use assets recognition 4,763,000        
Lease liabilities recognition $ 4,939,000        
Self Insurance          
Product Information [Line Items]          
Maximum amount of self-insurance per occurrence   $ 10,000,000.0      
Cost of sales          
Product Information [Line Items]          
Costs in selling, marketing, and distribution expenses     $ 4,400,000    
ASU 2014-09          
Product Information [Line Items]          
Description of payment terms We generally sell our products free on board, or FOB, shipping point and provide payment terms to most commercial customers ranging from 20 to 90 days of product shipment with a discount available to some customers for early payment. Generally, framework contracts define the general terms of sales, including payment terms, freight terms, insurance requirements, and cancelation provisions. Purchase orders define the terms for specific sales, including description, quantity, and price of each product purchased. We estimate variable consideration relative to the amount of cash discounts to which customers are likely to be entitled. In some instances, we provide longer payment terms, particularly as it relates to our fall dating programs for hunting sales, which represent payment terms due in the fall for certain orders of hunting products received in the spring and summer. As a result of utilizing practical expedience upon the adoption of ASC 606, we do not consider these extended terms to be a significant financing component of the contract because the payment terms are less than one year.        
ASU 2016-02          
Product Information [Line Items]          
Right-of-use assets recognition         $ 11,500,000
Lease liabilities recognition         12,800,000
Reclassification of deferred rent and lease incentive liabilities related to real estate operating leases         $ 1,300,000
Other Capitalized Property Plant and Equipment | Maximum          
Product Information [Line Items]          
Estimated useful life 10 years        
Sales, net | Customer Concentration Risk          
Product Information [Line Items]          
Number of Customers Accounted for Net Sales. | Customer 4 4 1    
Sales, net | Customer Concentration Risk | Customer One          
Product Information [Line Items]          
Concentration of risk, percentage 10.00% 10.00% 10.40%    
Sales, net | Customer Concentration Risk | Customer Four          
Product Information [Line Items]          
Concentration of risk, percentage 45.00% 43.90%      
Accounts Receivable | Customer Concentration Risk          
Product Information [Line Items]          
Number of Customers Accounted for Accounts Receivable | Customer 2 3 1    
Accounts Receivable | Customer Concentration Risk | Customer One          
Product Information [Line Items]          
Concentration of risk, percentage 10.00%   23.10%    
Accounts Receivable | Customer Concentration Risk | Customer Two          
Product Information [Line Items]          
Concentration of risk, percentage 28.40%        
Accounts Receivable | Customer Concentration Risk | Customer Three          
Product Information [Line Items]          
Concentration of risk, percentage   45.30%      
Level 2          
Product Information [Line Items]          
Fair value of financial instrument $ 0