CONSOLIDATED STATEMENT OF OPERATIONS (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Net sales	$ 57,744	$ 44,499
Cost of sales	44,612	37,667
Gross profit	13,132	6,832
Operating expenses
General and administrative expenses	6,932	6,599
Selling expenses	3,395	2,530
Total operating expenses	10,327	9,129
Income (loss) from operations	2,805	(2,297)
Loss from joint venture	(295)	(246)
Interest expense, net	490	371
Income (loss) from continuing operations before income taxes	2,020	(2,914)
Income tax expense (benefit)	58	(317)
Income (loss) from continuing operations	1,962	(2,597)
Income from discontinued operations, net of tax	9,119	541
Net income (loss)	$ 11,081	$ (2,056)
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Basic	6,932	6,915
Diluted	6,934	6,915
Earnings (loss) per share from continuing operations [Abstract]
Basic and diluted	$ 0.28	$ (0.38)
Earnings per share discontinued operations (Abstract)
Basic and diluted	$ 1.32	$ 0.08
Earnings (loss) per share [Abstract]
Basic and diluted	$ 1.60	$ (0.30)