CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Beginning balance, value at Apr. 30, 2021	$ 61	$ 637,534	$ (559,859)	$ 77,736
Beginning balance, shares at Apr. 30, 2021	61,069
Cumulative-effect adjustment from modified retrospective adoption of ASU 2020-06		(42,431)	810	(41,621)
Common stock issued under equity compensation plans	$ 1	3,358		3,359
Common stock issued under equity compensation plans, shares	738
Stock-based compensation expense		7,380		7,380
Net loss			127,672	127,672
Ending balance, value at Apr. 30, 2022	$ 62	605,841	(431,377)	174,526
Ending balance, shares at Apr. 30, 2022	61,807
Common stock issued under equity compensation plans	$ 1	3,405		3,406
Common stock issued under equity compensation plans, shares	885
Stock-based compensation expense		10,978		10,978
Net loss			259	259
Ending balance, value at Apr. 30, 2023	$ 63	620,224	(431,118)	189,169
Ending balance, shares at Apr. 30, 2023	62,692
Unwinding of capped calls related to repurchase of convertible senior notes due 2026		1,346		1,346
Common stock issued under equity compensation plans	$ 1	1,395		1,396
Common stock issued under equity compensation plans, shares	876
Stock-based compensation expense		9,731		9,731
Net loss			(140,753)	(140,753)
Ending balance, value at Apr. 30, 2024	$ 64	$ 632,696	$ (571,871)	$ 60,889
Ending balance, shares at Apr. 30, 2024	63,568