Note 9 - Stock Repurchase Program	12 Months Ended
Mar. 31, 2022
Notes to Financial Statements
Stock Repurchase Plan Disclosure [Text Block]	NOTE 9. STOCK REPURCHASE PROGRAM On January 21, 2009 we announced that our Board of Directors authorized the repurchase of up to $2,500,000 of our Common Stock from time to time in open market, block, or privately negotiated transactions. The timing and extent of any repurchases depends on market conditions, the trading price of the company’s stock, and other factors, and subject to the restrictions relating to volume, price, and timing under applicable law. On August 27, 2015, we announced that our Board of Directors authorized up to $5,000,000 of additional repurchases. Our repurchase program does not have an expiration date and does not obligate us to purchase any shares. The Program may be modified or discontinued at any time without notice. We intend to finance any stock repurchases with cash provided by operating activities or maturating marketable securities. We repurchased 2,888 shares of our Common Stock in fiscal 2022 and 1,806 shares in fiscal 2021. The remaining authorization was $3,598,519 as of March 31, 2022. The Stock Repurchase Program may be modified or discontinued at any time without notice.

Note 9 - Stock Repurchase Program

12 Months Ended

Mar. 31, 2022

Stock Repurchase Plan Disclosure [Text Block]

NOTE 9. STOCK REPURCHASE PROGRAM

On January 21, 2009 we announced that our Board of Directors authorized the repurchase of up to $2,500,000 of our Common Stock from time to time in open market, block, or privately negotiated transactions. The timing and extent of any repurchases depends on market conditions, the trading price of the company’s stock, and other factors, and subject to the restrictions relating to volume, price, and timing under applicable law. On August 27, 2015, we announced that our Board of Directors authorized up to $5,000,000 of additional repurchases. Our repurchase program does not have an expiration date and does not obligate us to purchase any shares. The Program may be modified or discontinued at any time without notice. We intend to finance any stock repurchases with cash provided by operating activities or maturating marketable securities. We repurchased 2,888 shares of our Common Stock in fiscal 2022 and 1,806 shares in fiscal 2021. The remaining authorization was $3,598,519 as of March 31, 2022. The Stock Repurchase Program may be modified or discontinued at any time without notice.