Note 6 - Shareholders' Equity (Tables)

12 Months Ended

Mar. 31, 2021

Notes Tables

Dividends Declared [Table Text Block]

Declaration Date	Per Share Dividend	Record Date	Total Amount (In thousands)	Payment Date
May 4, 2020	$0.28	May 15, 2020	$5,647	May 22, 2020
July 20, 2020	$0.28	July 31, 2020	$5,647	August 7, 2020
October 26, 2020	$0.28	November 9, 2020	$5,676	November 20, 2020
January 19, 2021	$0.28	February 1, 2021	$5,676	February 12, 2021