CONSOLIDATED AND COMBINED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Common Stock	Former Net Parent Company Investment	Additional Paid-In Capital	Retained Earnings
Balance at Apr. 30, 2018	$ 331,335		$ 331,335
Balance (Adjustments for New Accounting Pronouncement) at Apr. 30, 2018	(430)		(430)
Net (loss)/income	(9,521)		(9,521)
Net transfers from (to) former Parent	3,230		3,230
Balance at Apr. 30, 2019	324,614		324,614
Net (loss)/income	(96,201)		(96,201)
Net transfers from (to) former Parent	(4,315)		(4,315)
Balance at Apr. 30, 2020	224,098		224,098
Net (loss)/income	18,405		3,876		$ 14,529
Stock-based compensation	2,486			$ 2,486
Shares issued under employee stockpurchase plan	386			386
Shares issued under employee stock purchase plan (in shares)		35,000
Issuance of common stock under restricted stock unit awards, net of tax	(33)			(33)
Issuance of common stock under restricted stock unit awards, net of tax, shares		49,000
Net transfers from (to) former Parent	34,563		34,563
Issuance of common stock andreclassification of formernet parent company investment		$ 14	$ (262,537)	262,523
Issuance of common stock under restricted stock unit awards, net of tax, shares		13,975,000
Balance at Apr. 30, 2021	$ 279,905	$ 14		$ 265,362	$ 14,529
Balance (in shares) at Apr. 30, 2021	14,059,440	14,059,000