Discontinued Operations Discontinued operations balance sheet (Details) - USD ($) $ in Thousands	Jan. 31, 2018	Jan. 31, 2017
Discontinued operations [Line Items]
Trade accounts receivable, net discontinued operations	$ 0	$ 25
Total assets from discontinued operations	0	25
Trade accounts payable, accrued expenses and other	137	199
Total liabilities from discontinued operations	$ 137	$ 199