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Discontinued Operations - Summary of Major Business Line Items Included in Discontinued Operations in Condensed Consolidation Statements of Income/(Loss) and Comprehensive Income/(Loss) (Detail) - USD ($)
 3 Months Ended 6 Months Ended
Oct. 31, 2020
Oct. 31, 2019
Oct. 31, 2020
Oct. 31, 2019
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]        
Income/(loss) from discontinued operations, net of tax $ 3,123,000 $ 950,000 $ 8,209,000 $ (3,343,000)
Outdoor Products and Accessories Business        
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]        
Income/(loss) from discontinued operations, net of tax 3,100,000 950,000 8,200,000 (3,300,000)
Spin-off | Outdoor Products and Accessories Business        
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]        
Net revenues 13,168,000 40,670,000 61,249,000 68,899,000
Cost of sales 3,409,000 22,678,000 27,147,000 38,639,000
Operating expenses 5,825,000 16,681,000 23,458,000 34,753,000
Interest income, net   8,000   21,000
Other income/(expense), net 34,000 2,000 118,000  
Income/(loss) from discontinued operations before income taxes 3,968,000 1,321,000 10,762,000 (4,472,000)
Income tax (benefit)/expense 845,000 371,000 2,553,000 (1,129,000)
Income/(loss) from discontinued operations, net of tax $ 3,123,000 $ 950,000 $ 8,209,000 $ (3,343,000)