Summary of Significant Accounting Policies - Computation of Basic and Diluted Earnings per Share Attributed to Common Stockholders (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2022
Earnings Per Share [Abstract]
Basic loss	$ (12,248)	$ (12,024)	$ (64,880)
Diluted loss	$ (12,248)	$ (12,024)	$ (64,880)
Basic loss, Shares	12,967	13,372	13,930
Diluted loss, Shares	12,967	13,372	13,930
Basic loss, Per Share Amount	$ (0.94)	$ (0.9)	$ (4.66)
Diluted loss, Per Share Amount	$ (0.94)	$ (0.9)	$ (4.66)