Note 7 - Changes in Shareholders' Equity (Tables)

9 Months Ended

Dec. 31, 2021

Notes Tables

Schedule of Stockholders Equity [Table Text Block]

	Additional
	Paid-In		Retained
	Capital		Earnings
Beginning balance at March 31, 2021:	$	7,111	$	134,141
Share based compensation		718		-
Dividends declared		-		(6,080	)
Net income		-		4,428
Ending balance at June 30, 2021:	$	7,829	$	132,489
Share based compensation		882		-
Dividends declared		-		(6,092	)
Net income		-		6,349
Ending balance at September 30, 2021:	$	8,711	$	132,746
Share based compensation		1,440		-
Dividends declared		-		(6,282	)
Net income		-		4,257
Ending balance at December 31, 2021:	$	10,151	$	130,721

	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
Share based compensation		781		-
Dividends declared		-		(5,674	)
Net income		-		7,611
Ending balance at December 31, 2020:	$	6,098	$	133,000