Discontinued Operations Discontinued operations balance sheet (Details) - USD ($) $ in Thousands	Jan. 31, 2017	Jan. 31, 2016
Discontinued operations [Line Items]
Cash and cash equivalents	$ 0	$ 5
Trade accounts receivable, net	25	5,720
Inventory	0	2,000
Other assets	0	60
Property, plant and equipment, net of accumulated depreciation	0	6,456
Total assets from discontinued operations	25	14,241
Trade accounts payable, accrued expenses and other	199	7,514
Current maturities of long-term debt	0	5,322
Total liabilities from discontinued operations	$ 199	$ 12,836