CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Retained Earnings Adjustment	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Adjustment	Total
Balance at Mar. 31, 2022	$ 221	$ 62,048		$ 104,931	$ (9,951)		$ 157,249
Balance (in shares) at Mar. 31, 2022	22,127,396
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				9,846			9,846
Cash dividend on common stock				(2,610)			(2,610)
Exercise of stock options		4					$ 4
Exercise of stock options (in shares)	1,511						1,511
Stock repurchased	$ (7)	(4,777)					$ (4,784)
Stock repurchased (in shares)	(690,494)
Restricted stock grants and forfeited, net (in shares)	68,719
Stock-based compensation, net		192					192
Purchase of subsidiary shares from noncontrolling interest		(234)					(234)
Other comprehensive loss, net					(12,501)		(12,501)
Balance at Sep. 30, 2022	$ 214	57,233		112,167	(22,452)		147,162
Balance (in shares) at Sep. 30, 2022	21,507,132
Balance at Jun. 30, 2022	$ 219	60,838		108,266	(14,890)		154,433
Balance (in shares) at Jun. 30, 2022	21,943,160
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				5,194			5,194
Cash dividend on common stock				(1,293)			(1,293)
Stock repurchased	$ (5)	(3,500)					(3,505)
Stock repurchased (in shares)	(507,724)
Restricted stock forfeited (in shares)	71,696
Stock-based compensation, net		129					129
Purchase of subsidiary shares from noncontrolling interest		(234)					(234)
Other comprehensive loss, net					(7,562)		(7,562)
Balance at Sep. 30, 2022	$ 214	57,233		112,167	(22,452)		147,162
Balance (in shares) at Sep. 30, 2022	21,507,132
Balance at Mar. 31, 2023	$ 212	55,511	$ (53)	117,826	(18,310)	$ (53)	155,239
Balance (in shares) at Mar. 31, 2023	21,221,960
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				5,315			5,315
Cash dividend on common stock				(2,532)			(2,532)
Exercise of stock options		36					$ 36
Exercise of stock options (in shares)	12,799						12,799
Stock repurchased	$ (1)	(576)					$ (577)
Stock repurchased (in shares)	(109,162)
Restricted stock grants and forfeited, net (in shares)	292
Stock-based compensation, net		(8)					(8)
Other comprehensive loss, net					(5,381)		(5,381)
Balance at Sep. 30, 2023	$ 211	54,963		120,556	(23,691)		152,039
Balance (in shares) at Sep. 30, 2023	21,125,889
Balance at Jun. 30, 2023	$ 211	55,016		119,351	(20,512)		154,066
Balance (in shares) at Jun. 30, 2023	21,115,919
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				2,472			2,472
Cash dividend on common stock				(1,267)			(1,267)
Exercise of stock options		17					17
Exercise of stock options (in shares)	6,000
Restricted stock forfeited (in shares)	3,970
Stock-based compensation, net		(70)					(70)
Other comprehensive loss, net					(3,179)		(3,179)
Balance at Sep. 30, 2023	$ 211	$ 54,963		$ 120,556	$ (23,691)		$ 152,039
Balance (in shares) at Sep. 30, 2023	21,125,889