CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total
Balance at Mar. 31, 2020	$ 225	$ 64,649	$ 81,870	$ 2,099	$ 148,843
Balance (in shares) at Mar. 31, 2020	22,544,285
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			480		480
Cash dividend on common stock			(1,110)		(1,110)
Exercise of stock options		9			$ 9
Exercise of stock options (in shares)	5,000				5,000
Stock repurchased	$ (3)	(1,444)			$ (1,447)
Stock repurchased (in shares)	(295,900)
Restricted stock cancelled (in shares)	(7,913)
Stock-based compensation expense		40			40
Other comprehensive income, net				663	663
Balance at Jun. 30, 2020	$ 222	63,254	81,240	2,762	147,478
Balance (in shares) at Jun. 30, 2020	22,245,472
Balance at Mar. 31, 2021	$ 223	63,650	87,881	(160)	151,594
Balance (in shares) at Mar. 31, 2021	22,351,235
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			5,755		5,755
Cash dividend on common stock			(1,114)		$ (1,114)
Exercise of stock options (in shares)					0
Stock repurchased	$ (1)	(492)			$ (493)
Stock repurchased (in shares)	(73,367)
Stock-based compensation expense		55			55
Other comprehensive income, net				1,179	1,179
Balance at Jun. 30, 2021	$ 222	$ 63,213	$ 92,522	$ 1,019	$ 156,976
Balance (in shares) at Jun. 30, 2021	22,277,868