CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($)	12 Months Ended
	May 31, 2022	May 31, 2021
Income Statement [Abstract]
Net sales	$ 18,871,409	$ 7,199,027
Cost of sales	(15,893,991)	(6,832,742)
Gross profit	2,977,418	366,285
Operating expenses:
Selling, general and administrative	5,698,958	5,671,517
Research and development	1,812,424	2,194,461
Total operating expense	7,511,382	7,865,978
Loss from operations	(4,533,964)	(7,499,693)
Other income:
Dividend and interest income	26,639	66,863
Interest expense		(367)
Total other income	26,639	66,496
Loss before income taxes	(4,507,325)	(7,433,197)
Provision for income taxes	(23,719)	(13,057)
Net loss	$ (4,531,044)	$ (7,446,254)
Basic net loss per common share (in Dollars per share)	$ (0.36)	$ (0.62)
Diluted net loss per common share (in Dollars per share)	$ (0.36)	$ (0.62)
Weighted average number of common and common equivalent shares:
Basic (in Shares)	12,673,245	11,928,941
Diluted (in Shares)	12,673,245	11,928,941
Net loss	$ (4,531,044)	$ (7,446,254)
Other comprehensive loss, net of tax:
Foreign currency translation	(25,980)	(8,115)
Comprehensive loss	$ (4,557,024)	$ (7,454,369)