Income Taxes - Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2022
Reasons for consolidated income tax provision
Income tax benefit at federal statutory tax rate of 21.0%, 21.0% and 21.0%, respectively	$ (40,244)	$ (11,432)	$ (6,289)
State income taxes, net of Federal tax benefit	(3,016)	(353)	(536)
Impact of Non-U.S. operations	2,440	14	199
Research and development tax credit	(907)	(991)	395
Meals and entertainment	244	258	179
Goodwill impairment	4,867	3,055	0
Non-deductible executive compensation	201	366	686
Change in valuation allowance	26,921	5,556	3,168
Stock based compensation	1,357	505	(1,616)
Other	848	1,027	412
Income tax benefit	$ (7,289)	$ (1,995)	$ (3,402)