Concentration of Risk (Tables)

3 Months Ended

Apr. 30, 2017

Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member]

Concentration Risk [Line Items]

Schedule Of Significant Customers Accounting For At Least 10% Of Net Sales or Receivables

The following significant customers accounted for at least 10% of net sales in one or more of the periods indicated:

	Three Months Ended
(percentage of net sales)	April 30, 2017		May 1, 2016
Trend-tek Technology Ltd (and affiliates)	10	%	12	%