Note L - Stockholders' Equity - Schedule of Stockholders' Equity (Details) (Parentheticals) - $ / shares	3 Months Ended				9 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Cash dividends, per share (in dollars per share)	$ 0.02	$ 0.02	$ 0.02	$ 0.02	$ 0.06	$ 0.06