NOTE 6. INCOME TAXES: Unrealized Gain (Loss) on Investments (Details) - USD ($)	12 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Details
Unrealized loss from available-for-sale securities	$ (1,146,618)	$ (1,816,742)
Unrealized loss from available-for-sale securities, tax effects	250,880	397,503
Unrealized loss from available-for-sale securities, net of tax	$ (895,738)	$ (1,419,239)

Amount of unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Name:	us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration