CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained (Deficit)/Earnings	Treasury Stock
Balance at Apr. 30, 2021	$ 279,905	$ 14	$ 265,362	$ 14,529
Balance, shares at Apr. 30, 2021		14,059,000
Net loss	(64,880)			(64,880)
Stock-based compensation	2,812		2,812
Shares issued under employee stock purchase plan	870		870
Shares issued under employee stock purchase plan, shares		77,000
Proceeds from exercise of stock options	5		5
Proceeds from exercise of stock options, shares		3,000
Issuance of common stock under restricted stock unit awards, net of tax	(656)		(656)
Issuance of common stock under restricted stock unit awards, net of tax, shares		101,000
Repurchase of treasury stock	(15,025)				$ (15,025)
Repurchase of treasury stock, shares					837,000
Balance at Apr. 30, 2022	203,031	$ 14	268,393	(50,351)	$ (15,025)
Balance, shares at Apr. 30, 2022		14,240,000			837,000
Net loss	(12,024)			(12,024)
Stock-based compensation	4,050		4,050
Shares issued under employee stock purchase plan	656		656
Shares issued under employee stock purchase plan, shares		90,000
Issuance of common stock under restricted stock unit awards, net of tax	(315)		(315)
Issuance of common stock under restricted stock unit awards, net of tax, shares		117,000
Repurchase of treasury stock	(3,534)				$ (3,534)
Repurchase of treasury stock, shares					377,000
Balance at Apr. 30, 2023	$ 191,864	$ 14	272,784	(62,375)	$ (18,559)
Balance, shares at Apr. 30, 2023	13,233,151	14,447,000			1,214,000
Net loss	$ (12,248)			(12,248)
Stock-based compensation	4,075		4,075
Shares issued under employee stock purchase plan	672	$ 1	671
Shares issued under employee stock purchase plan, shares		92,000
Issuance of common stock under restricted stock unit awards, net of tax	(423)		(423)
Issuance of common stock under restricted stock unit awards, net of tax, shares		162,000
Repurchase of treasury stock	(6,015)				$ (6,015)
Repurchase of treasury stock, shares					689
Balance at Apr. 30, 2024	$ 177,925	$ 15	$ 277,107	$ (74,623)	$ (24,574)
Balance, shares at Apr. 30, 2024	12,797,865	14,701			1,903