Note 6 - Changes in Shareholders' Equity (Tables)

6 Months Ended

Sep. 30, 2020

Notes Tables

Schedule of Stockholders Equity [Table Text Block]

	Additional
	Paid-In		Retained
	Capital		Earnings
Beginning balance at March 31, 2020:	$	3,804	$	126,177
Share based compensation		740		-
Dividends declared		-		(5,647	)
Net income		-		7,768
Ending balance at June 30, 2020:	$	4,544	$	128,298
Share based compensation		773		-
Dividends declared		-		(5,647	)
Net income		-		8,412
Ending balance at September 30, 2020:	$	5,317	$	131,063

	Additional
	Paid-In			Retained
	Capital			Earnings
Beginning balance at March 31, 2019:	$	12,478		$	122,172
Share based compensation		635			-
Dividends declared		-			(5,518	)
Repurchase and retirement of common stock		(11,496	)		-
Net income		-			5,343
Ending balance at June 30, 2019:	$	1,617		$	121,997
Share based compensation		730			-
Dividends declared		-			(5,447	)
Net income		-			6,665
Ending balance at September 30, 2019:	$	2,347		$	123,215