Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Retained Earnings
Balance at Mar. 31, 2020	$ 107,579	$ 34,867	$ (71,438)	$ 144,150
Balance (in shares) at Mar. 31, 2020		7,806,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,351			8,351
Issuance of restricted stock awards (in shares)		14,000
Treasury stock repurchases	(905)		(905)
Treasury stock repurchases (in shares)		(112,000)
Share-based compensation	197	$ 197
Balance at Mar. 31, 2021	115,222	$ 35,064	(72,343)	152,501
Balance (in shares) at Mar. 31, 2021		7,708,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,998			2,998
Issuance of restricted stock awards (in shares)		18,000
Exercise of stock options	28	$ 28
Exercise of stock options (in shares)		2,000
Treasury stock repurchases	(2,062)		(2,062)
Treasury stock repurchases (in shares)		(182,000)
Share-based compensation	200	$ 200
Balance at Mar. 31, 2022	$ 116,386	$ 35,292	$ (74,405)	$ 155,499
Balance (in shares) at Mar. 31, 2022		7,546,000