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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, 2025
Oct. 31, 2024
Oct. 31, 2025
Oct. 31, 2024
Net Loss        
Basic earnings $ 1,917 $ 4,546 $ (1,494) $ 2,691
Effect of dilutive stock awards 0 0 0 0
Diluted earnings $ 1,917 $ 4,546 $ (1,494) $ 2,691
Weighted average shares outstanding — Basic 44,396 44,523 44,329 44,922
Effect of dilutive stock awards 341 412 0 482
Weighted average shares outstanding — Diluted 44,737 44,935 44,329 45,404
Earnings per share - Basic        
Net income $ 0.04 $ 0.1 $ (0.03) $ 0.06
Earnings per share - Diluted        
Net income 0.04 0.1 (0.03) 0.06
Earnings Per Share - Effect of Dilutive Stock Awards        
Effect of dilutive stock awards $ 0 $ 0 $ 0 $ 0