Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Consolidated Statements of Operations [Abstract]
Net sales	$ 112,237	$ 106,473
Cost of sales	95,292	89,501
Gross profit	16,945	16,972
Selling, general and administrative expenses	15,944	15,428
Operating income	1,001	1,544
Interest expense, net	1,224	1,117
Income (loss) before income taxes	(223)	427
Income tax expenses (benefit)	(86)	164
Net income (loss)	$ (137)	$ 263
Net income (loss) per share basic	$ (0.01)	$ 0.02
Net income (loss) per share diluted	$ (0.01)	$ 0.02