Income Taxes - Income Tax Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
May 31, 2023	May 31, 2022	May 31, 2021
Current
U.S.	$ 129	$ 120	$ 100
Non U.S.	187	186	201
Current	316	306	301
Deferred
U.S.	(207)	(3,415)	(3,375)
Non U.S.	(2,104)	(293)	(1,430)
Deferred	(2,311)	(3,708)	(4,805)
Income tax benefit	$ (1,995)	$ (3,402)	$ (4,504)

Amount of current foreign income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

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Amount of current state and local tax expense (benefit) attributable to income (loss) from continuing operations. Includes, but is not limited to, current regional, territorial, and provincial tax expense (benefit) for non-US (United States of America) jurisdiction.

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Amount of deferred federal tax expense (benefit) attributable to income (loss) from continuing operations. Includes, but is not limited to, deferred national tax expense (benefit) for non-US (United States of America) jurisdiction.

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Amount of deferred foreign income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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