NOTE 6. STOCK-BASED COMPENSATION: Schedule of Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value (Details) - USD ($)	12 Months Ended
Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Details
Options Outstanding	36,000
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	5 years 11 months 15 days
Options Outstanding, Weighted Average Exercise Price	$ 69.5	$ 66.26	$ 69.52
Options Outstanding, Aggregate Intrinsic Value	$ 764,355
Options Exercisable	33,500	32,000
Options Exercisable, Weighted Average Exercise Price	$ 65.12	$ 63.6
Options Exercisable, Aggregate Intrinsic Value	$ 764,355

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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