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, 2024	Oct. 31, 2023	Oct. 31, 2024	Oct. 31, 2023
Net income
Income from continuing operations	$ 4,134	$ 2,498	$ 2,026	$ 5,616
Income from discontinued operations	0	0	0	0
Net income	$ 4,134	$ 2,498	$ 2,026	$ 5,616
Weighted average shares outstanding — Basic	44,523	45,977	44,922	46,042
Effect of dilutive stock awards	412	384	482	416
Weighted average shares outstanding — Diluted	44,935	46,361	45,404	46,458
Earnings per share - Basic
Net income	$ 0.09	$ 0.05	$ 0.05	$ 0.12
Earnings per share - Diluted
Net income	0.09	0.05	0.04	0.12
Earnings Per Share - Effect of Dilutive Stock Awards
Effect of dilutive stock awards	$ 0	$ 0	$ (0.01)	$ 0