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Stockholders' Equity - Reconciliation of Net Income Amounts and Weighted Average Number of Common and Common Equivalent Shares Used to Determine Basic and Diluted Earnings per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Oct. 31, 2023
Oct. 31, 2022
Oct. 31, 2023
Oct. 31, 2022
Net income        
Income from continuing operations $ 2,498 $ 9,648 $ 5,616 $ 12,960
Income from discontinued operations 0 0 0 0
Net income $ 2,498 $ 9,648 $ 5,616 $ 12,960
Weighted average shares outstanding — Basic 45,977 45,815 46,042 45,777
Effect of dilutive stock awards 384 291 416 327
Weighted average shares outstanding — Diluted 46,361 46,106 46,458 46,104
Earnings per share - Basic        
Net income $ 0.05 $ 0.21 $ 0.12 $ 0.28
Earnings per share - Diluted        
Net income 0.05 0.21 0.12 0.28
Earnings Per Share - Effect of Dilutive Stock Awards        
Effect of dilutive stock awards $ 0 $ 0 $ 0 $ 0