Description of risks that arise due to the volume of business transacted with a particular customer. At a minimum, the description informs financial statement users of the general nature of the risk, but excludes "Information about Major Customers" that may be disclosed elsewhere (for instance, segment disclosures).

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Description of risks that arise due to the volume of business transacted with a particular supplier or reliance placed on that supplier. At a minimum, the description informs financial statement users of the general nature of the risk.

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For banks and other depository institutions (including Federal Reserve Banks, if applicable): Interest-bearing deposits in other financial institutions for relatively short periods of time including, for example, certificates of deposits, which are presented separately from cash on the balance sheet.

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Concentration of Risk (Details Textual) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Jan. 31, 2017
UNITED STATES
Concentration Risk [Line Items]
Interest-bearing Deposits in Banks and Other Financial Institutions	$ 11.1		$ 1.4
Foreign Countries [Member]
Concentration Risk [Line Items]
Interest-bearing Deposits in Banks and Other Financial Institutions	$ 10.4		$ 9.0
Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Customer	No customer accounted for more than 10% of net sales	No customer accounted for more than 10% of net sales
Supplier Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Supplier	No supplier accounted for more than 10% of net purchases	No supplier accounted for more than 10% of net purchases