Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Treasury Stock	Retained Earnings
Balance at Mar. 31, 2019	$ 104,885	$ 34,660	$ (70,459)	$ 140,684
Balance (in shares) at Mar. 31, 2019		7,910
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of restricted stock awards (in shares)		18
Share-based compensation	34	$ 34
Net income	591			591
Balance at Jun. 30, 2019	105,510	$ 34,694	(70,459)	141,275
Balance (in shares) at Jun. 30, 2019		7,928
Balance at Mar. 31, 2020	107,579	$ 34,867	(71,438)	144,150
Balance (in shares) at Mar. 31, 2020		7,806
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of restricted stock awards (in shares)		1
Share-based compensation	49	$ 49
Treasury stock repurchases	(28)		(28)
Treasury stock repurchases (in shares)		(5)
Net income	1,430			1,430
Balance at Jun. 30, 2020	$ 109,030	$ 34,916	$ (71,466)	$ 145,580
Balance (in shares) at Jun. 30, 2020		7,802