NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Concentration of Risk and Financial Instruments (Policies)	12 Months Ended
Mar. 31, 2023
Policies
Concentration of Risk and Financial Instruments	Concentration of Risk and Financial Instruments Financial instruments potentially subject to significant concentrations of credit risk consist principally of cash equivalents, marketable securities, and accounts receivable. Cash and cash equivalents have been maintained in financial institutions we believe have high credit quality, however, these accounts are generally in excess of federally insured amounts. We have invested our excess cash in corporate-backed and municipal-backed bonds and money market instruments. Our investment policy prescribes purchases of only high-grade securities, and limits the amount of credit exposure to any one issuer. Our customers are throughout the world. We generally do not require collateral from our customers, but we perform ongoing credit evaluations of their financial condition. More information on accounts receivable is contained in the paragraph titled “Accounts Receivable and Allowance for Doubtful Accounts” of this note. Additionally, we are dependent on critical suppliers including our packaging vendors and suppliers of certain raw silicon and semiconductor wafers that are incorporated in our products. Industry shortages and supply-chain disruptions in the past several years have increased the risks of supply interruptions.

NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Concentration of Risk and Financial Instruments (Policies)

12 Months Ended

Mar. 31, 2023

Concentration of Risk and Financial Instruments

Concentration of Risk and Financial Instruments

Financial instruments potentially subject to significant concentrations of credit risk consist principally of cash equivalents, marketable securities, and accounts receivable.

Cash and cash equivalents have been maintained in financial institutions we believe have high credit quality, however, these accounts are generally in excess of federally insured amounts.

We have invested our excess cash in corporate-backed and municipal-backed bonds and money market instruments. Our investment policy prescribes purchases of only high-grade securities, and limits the amount of credit exposure to any one issuer.

Our customers are throughout the world. We generally do not require collateral from our customers, but we perform ongoing credit evaluations of their financial condition. More information on accounts receivable is contained in the paragraph titled “Accounts Receivable and Allowance for Doubtful Accounts” of this note.

Additionally, we are dependent on critical suppliers including our packaging vendors and suppliers of certain raw silicon and semiconductor wafers that are incorporated in our products. Industry shortages and supply-chain disruptions in the past several years have increased the risks of supply interruptions.