Discontinued Operations - Current Assets and Current Liabilities from Discontinued Operations (Details) - USD ($) $ in Thousands	Oct. 31, 2023	Apr. 30, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets of discontinued operations	$ 0	$ 3,603
Current liabilities of discontinued operations	0	318
Discontinued Operations, Disposed of by Sale | TPM
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	0	637
Trade accounts receivable, less allowance for doubtful accounts	0	2,964
Prepaid expenses and other current assets	0	2
Current assets of discontinued operations	0	3,603
Current liabilities of discontinued operations	$ 0	$ 318