Note 6 - Changes in Shareholders' Equity (Tables)

6 Months Ended

Sep. 30, 2021

Notes Tables

Schedule of Stockholders Equity [Table Text Block]

			Additional
	Common		Paid-In		Retained
	Stock		Capital		Earnings
Beginning balance at March 31, 2021:	$	20	$	7,111	$	134,141
Share based compensation		-		718		-
Dividends declared		-		-		(6,080	)
Net income		-		-		4,428
Ending balance at June 30, 2021:	$	20	$	7,829	$	132,489
Shares Issued		1
Share based compensation		-		882		-
Dividends declared		-		-		(6,092	)
Net income		-		-		6,349
Ending balance at September 30, 2021:	$	21	$	8,711	$	132,746

			Additional
	Common		Paid-In		Retained
	Stock		Capital		Earnings
Beginning balance at March 31, 2020:	$	20	$	3,804	$	126,177
Share based compensation		-		740		-
Dividends declared		-		-		(5,647	)
Net income		-		-		7,768
Ending balance at June 30, 2020:	$	20	$	4,544	$	128,298
Share based compensation		-		773		-
Dividends declared		-		-		(5,647	)
Net income		-		-		8,412
Ending balance at September 30, 2020:	$	20	$	5,317	$	131,063