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Discontinued Operations (Detail) - Consolidated Condensed Statements of Operations that were reclassified as discontinued operations (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011
Net sales and revenue	$ 518	$ 1,149	$ 1,108	$ 2,490
Cost of sales	42	266	154	541
Income before income taxes	310	525	598	1,108
Provision for income taxes	(135)	(190)	(250)	(394)
Income from discontinued operations, net of tax	175	335	348	714
Gain on disposal	99	62	83	266
Provision for income taxes	(43)	(22)	(34)	(92)
Gain on disposal of discontinued operations, net of tax	$ 56	$ 40	$ 49	$ 174

X

- Definition

Amount of gain (loss), before tax expense or benefit and not previously recognized, resulting from the sale of a business component.

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Amount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component.

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