Condensed Consolidated Statements of Income (unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Feb. 28, 2023	Feb. 28, 2022	Feb. 28, 2023	Feb. 28, 2022
Condensed Consolidated Statements of Income (unaudited)
Sales, net	$ 9,891,272	$ 6,143,329	$ 29,479,337	$ 21,209,052
Cost of goods sold	5,870,523	4,768,479	17,980,006	15,371,500
Gross profit	4,020,749	1,374,850	11,499,331	5,837,552
Research and development costs	190,688	201,277	881,335	684,494
Selling, general and administrative expenses	2,025,115	1,364,664	5,878,214	4,445,623
Operating income	1,804,946	(191,091)	4,739,782	707,435
Other income, net	239,941	4,798	432,984	75,953
Income before provision for income taxes	2,044,887	(186,293)	5,172,766	783,388
Provision for income taxes	386,000	(69,000)	952,000	59,000
Net income	$ 1,658,887	$ (117,293)	$ 4,220,766	$ 724,388
Basic and diluted earnings per common share	$ 0.47	$ (0.03)	$ 1.20	$ 0.21