Financing Arrangements Unamortized debt Issuance costs (Details) - USD ($) $ in Thousands		Apr. 30, 2018	Jan. 31, 2018
Line of Credit Facility [Line Items]
Debt Issuance Costs, Line of Credit Arrangements, Net	[1]	$ 215	$ 242

[1] Unamortized debt issuance costs are reported as "Other assets" in the Consolidated Balance Sheets.