Condensed Consolidated Statements of Income - USD ($)	3 Months Ended		6 Months Ended
	Nov. 30, 2022	Nov. 30, 2021	Nov. 30, 2022	Nov. 30, 2021
Income Statement [Abstract]
Sales, net	$ 10,497,366	$ 7,757,986	$ 19,588,065	$ 15,065,723
Cost of goods sold	6,403,541	5,167,463	12,109,483	10,603,021
Gross profit	4,093,825	2,590,523	7,478,582	4,462,702
Research and development costs	315,301	201,277	690,647	483,217
Selling, general and administrative expenses	2,022,061	1,608,860	3,853,099	3,080,959
Operating income	1,756,463	780,386	2,934,836	898,526
Other income, net	153,045	7,418	193,043	71,155
Income before provision for income taxes	1,909,508	787,804	3,127,879	969,681
Provision for income taxes	350,000	128,000	566,000	128,000
Net income	$ 1,559,508	$ 659,804	$ 2,561,879	$ 841,681
Basic and diluted earnings per common share	$ 0.45	$ 0.19	$ 0.73	$ 0.24