STATEMENTS OF INCOME (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue
Product sales	$ 7,117,122	$ 10,514,539	$ 15,817,214	$ 17,587,500
Contract research and development	16,154	203,285	147,476	466,731
Total revenue	7,133,276	10,717,824	15,964,690	18,054,231
Cost of sales	1,599,866	2,402,781	3,679,489	4,054,628
Gross profit	5,533,410	8,315,043	12,285,201	13,999,603
Expenses
Research and development	683,208	669,978	1,379,200	1,271,896
Selling, general, and administrative	433,785	435,625	908,900	806,946
Provision for credit losses	(202,926)		9,514
Total expenses	914,067	1,105,603	2,297,614	2,078,842
Income from operations	4,619,343	7,209,440	9,987,587	11,920,761
Interest income	512,092	351,375	948,618	634,436
Income before taxes	5,131,435	7,560,815	10,936,205	12,555,197
Provision for income taxes	407,869	1,470,442	1,808,909	2,324,707
Net income	$ 4,723,566	$ 6,090,373	$ 9,127,296	$ 10,230,490
Net income per share – basic	$ 0.98	$ 1.26	$ 1.89	$ 2.12
Net income per share – diluted	0.98	1.26	1.89	2.12
Cash dividends declared per common share	$ 1.00	$ 1.00	$ 2.00	$ 2.00
Weighted average shares outstanding
Basic	4,833,401	4,830,826	4,832,786	4,830,826
Diluted	4,840,770	4,830,956	4,840,688	4,830,927
Net income	$ 4,723,566	$ 6,090,373	$ 9,127,296	$ 10,230,490