Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Retained Earnings
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]
Issuance of restricted stock awards (in shares)		12,000
Share-based compensation	87	$ 87
Treasury stock	(1,552)		(1,552)
Treasury stock (in shares)		(137,000)
Net (loss) income	3,332			3,332
Balance at Sep. 30, 2021	117,089	$ 35,151	(73,895)	155,833
Balance (in shares) at Sep. 30, 2021		7,583,000
Balance at Jun. 30, 2021	116,332	$ 35,110	(73,008)	154,230
Balance (in shares) at Jun. 30, 2021		7,650,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of restricted stock awards (in shares)		10,000
Share-based compensation	41	$ 41
Treasury stock	(887)		(887)
Treasury stock (in shares)		(77,000)
Net (loss) income	1,603			1,603
Balance at Sep. 30, 2021	117,089	$ 35,151	(73,895)	155,833
Balance (in shares) at Sep. 30, 2021		7,583,000
Balance at Mar. 31, 2022	116,386	$ 35,292	(74,405)	155,499
Balance (in shares) at Mar. 31, 2022		7,546,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of restricted stock awards (in shares)		11,000
Cancellation of restricted stock awards	(175)	$ (175)
Cancellation of restricted stock awards (in shares)		(26,000)
Share-based compensation	55	$ 55
Treasury stock	(2,279)		(2,279)
Treasury stock (in shares)		(222,000)
Net (loss) income	(4,949)			(4,949)
Balance at Sep. 30, 2022	109,038	$ 35,172	(76,684)	150,550
Balance (in shares) at Sep. 30, 2022		7,309,000
Balance at Jun. 30, 2022	112,322	$ 35,143	(76,543)	153,722
Balance (in shares) at Jun. 30, 2022		7,315,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of restricted stock awards (in shares)		11,000
Share-based compensation	29	$ 29
Treasury stock	(141)		(141)
Treasury stock (in shares)		(17,000)
Net (loss) income	(3,172)			(3,172)
Balance at Sep. 30, 2022	$ 109,038	$ 35,172	$ (76,684)	$ 150,550
Balance (in shares) at Sep. 30, 2022		7,309,000