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Note 12 - Subsequent Events	6 Months Ended
Note 12 - Subsequent Events	Sep. 30, 2020
Notes to Financial Statements
Subsequent Events [Text Block]	NOTE 12. SUBSEQUENT EVENTS On October 21, 2020 we announced that our Board had declared a quarterly cash dividend of $1.00 per share of Common Stock to be paid November 30, 2020 to shareholders of record as of the close of business November 2, 2020.