Discontinued Operations - Earning from Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax expense	$ 461	$ 52	$ 503	$ 109
Earnings from discontinued operations, net of income taxes	1,742	189	1,876	278
Discontinued Operations, Disposed of by Sale | TPM
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	1,666	4,159	4,932	8,674
Cost of revenue	1,411	3,333	3,959	7,012
Total operating expenses	176	585	718	1,275
Gain on disposal of discontinued operations	2,124	0	2,124	0
Earnings from operations of discontinued operations	2,203	241	2,379	387
Income tax expense	461	52	503	109
Earnings from discontinued operations, net of income taxes	$ 1,742	$ 189	$ 1,876	$ 278