STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($)	Common Stock	Additional Paid-in Capital	AOCI Including Portion Attributable to Noncontrolling Interest	Retained Earnings	Total
Equity Balance, Starting at Mar. 31, 2023	$ 48,308	$ 19,295,442	$ (1,213,858)	$ 48,949,610	$ 67,079,502
Shares Outstanding, Starting at Mar. 31, 2023	4,830,826
Unrealized loss from marketable securities, net of tax			(234,701)		(234,701)
Net income				4,403,730	4,403,730
Total comprehensive income					4,169,029
Shares Granted, Value, Share-Based Payment Arrangement, after Forfeiture		10,536			10,536
Cash dividends declared ($1.00 per share of common stock)				(4,830,826)	(4,830,826)
Stock Issued During Period, Value, Stock Options Exercised	$ 26	117,501			117,527
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period	2,575
Shares Outstanding, Ending at Jun. 30, 2023	4,833,401
Equity Balance, Ending at Jun. 30, 2023	$ 48,334	19,423,479	(1,448,559)	48,522,514	66,545,768
Equity Balance, Starting at Mar. 31, 2024	$ 48,337	19,554,812	(777,637)	46,743,005	65,568,517
Shares Outstanding, Starting at Mar. 31, 2024	4,833,676
Unrealized loss from marketable securities, net of tax			28,710		28,710
Net income				4,097,587	4,097,587
Total comprehensive income					4,126,297
Shares Granted, Value, Share-Based Payment Arrangement, after Forfeiture		18,442			18,442
Cash dividends declared ($1.00 per share of common stock)				(4,833,676)	(4,833,676)
Shares Outstanding, Ending at Jun. 30, 2024	4,833,676
Equity Balance, Ending at Jun. 30, 2024	$ 48,337	$ 19,573,254	$ (748,927)	$ 46,006,916	$ 64,879,580