Property, Plant, and Equipment, Net (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Feb. 29, 2024	May 31, 2024	May 31, 2023	May 31, 2022
Property, plant and equipment
Property, plant and equipment		$ 108,212	$ 102,917
Less accumulated depreciation		(69,675)	(59,026)
Less building impairment		(3,364)	0
Property, plant and equipment excluding land and land improvements		35,173	43,891
Land and land improvements		493	493
Property, plant and equipment, Net		35,666	44,384
Depreciation expense		14,700	11,900	$ 7,600
Accelerated depreciation		2,400
Impairment charges	$ 3,400
Building and building improvements
Property, plant and equipment
Property, plant and equipment		30,099	29,660
Computer software and equipment
Property, plant and equipment
Property, plant and equipment		28,407	27,435
Machinery and equipment
Property, plant and equipment
Property, plant and equipment		15,756	17,023
Placement and evaluation units
Property, plant and equipment
Property, plant and equipment		31,312	26,355
Construction in progress
Property, plant and equipment
Property, plant and equipment		$ 2,638	$ 2,444