Statements of Consolidated Stockholders' Equity (USD $) In Thousands, except Share data	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Total Comprehensive Income (Loss)
Balance at Mar. 31, 2009		$ 98	$ (6,704)	$ 93,778	$ (53,820)	$ (25)
Balance, shares at Mar. 31, 2009		9,778,097	(412,731)
Net income (loss)	(6,043)				(6,043)		(6,043)
Issuance of stock under compensation and bonus plan			(38)	38
Issuance of stock under compensation and bonus plan, shares		35,000	(3,416)
Stock based compensation expense				796
Change in fair value of interest rate swap, net of taxes						(126)	(126)
Change in funded status of the defined benefit post retirement plan, net of taxes						(134)	(134)
Balance at Mar. 31, 2010		98	(6,742)	94,612	(59,863)	(285)	(6,303)
Balance, shares at Mar. 31, 2010		9,813,097	(416,147)
Net income (loss)	5,026				5,026		5,026
Issuance of stock under compensation and bonus plan			(7)	2
Issuance of stock under compensation and bonus plan, shares		32,906	(820)
Stock based compensation expense				454
Change in fair value of interest rate swap, net of taxes						91	91
Change in funded status of the defined benefit post retirement plan, net of taxes						47	47
Balance at Mar. 31, 2011	33,433	98	(6,749)	95,068	(54,837)	(147)	5,164
Balance, shares at Mar. 31, 2011		9,846,003	(416,967)
Net income (loss)	3,776				3,776		3,776
Issuance of stock under stock option plan		1	(82)	276
Issuance of stock under stock option plan, shares		37,500	(9,592)
Issuance of stock under compensation and bonus plan, shares		33,352	(145)
Stock based compensation expense				675
Change in fair value of interest rate swap, net of taxes						35	35
Change in funded status of the defined benefit post retirement plan, net of taxes						38	38
Balance at Mar. 31, 2012	$ 38,152	$ 99	$ (6,831)	$ 96,019	$ (51,061)	$ (74)	$ 3,849
Balance, shares at Mar. 31, 2012		9,916,855	(426,704)