Condensed Consolidated Statements of Income (unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Nov. 30, 2024	Nov. 30, 2023	Nov. 30, 2024	Nov. 30, 2023
Condensed Consolidated Statements of Income (unaudited)
Sales, net	$ 8,548,881	$ 10,339,875	$ 20,166,737	$ 20,263,503
Cost of goods sold	4,662,781	5,529,208	10,777,007	11,068,260
Gross profit	3,886,100	4,810,667	9,389,730	9,195,243
Research and development costs	102,922	84,081	172,114	213,155
Selling, general and administrative expenses	2,838,993	2,672,926	5,368,530	5,008,883
Operating income	944,185	2,053,660	3,849,086	3,973,205
Other income	307,871	398,688	684,625	760,006
Income before provision for income taxes	1,252,056	2,452,348	4,533,711	4,733,211
Provision for income taxes	195,896	471,000	810,896	904,000
Net income	$ 1,056,160	$ 1,981,348	$ 3,722,815	$ 3,829,211
Basic and diluted earnings per common share	$ 0.34	$ 0.56	$ 1.19	$ 1.09