NOTE 4. NET INCOME PER SHARE: Schedule of Earnings Per Share, Basic and Diluted (Details) - shares	3 Months Ended		9 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Details
Weighted Average Number of Shares Outstanding, Basic	4,830,826	4,833,604	4,830,826	4,833,356
Dilutive effect of stock options	1,542	2,166	342	2,425
Shares used in computing net income per share - diluted	4,832,368	4,835,770	4,831,168	4,835,781