Discontinued Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016
Discontinued operations [Line Items]
Assets of discontinued operations	$ 25	$ 14,241
Liabilities of discontinued operations	199	12,836
Discontinued operation, net sales	10,467	64,975
Gain on disposal of discontinued operations	209	8,099
Impairment expense on discontinued operations	0	(6,480)
Income (loss) from discontinued operation	1,522	(7,569)
Income (loss) from discontinued operation, before income tax	1,731	(5,950)
Discontinued operation, income tax expense	1,043	94
Income (loss) from discontinued operations, net of tax	$ 688	$ (6,044)