Segment Information - Net Sales Activity by Geographic Region (Details) - Sales Revenue, Goods, Net [Member]	3 Months Ended
	Apr. 30, 2017	May 01, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	100.00%	100.00%
Asia-Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	75.00%	77.00%
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	22.00%	14.00%
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	7.00%	9.00%
Other: Warrant Shares [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	(4.00%)	0.00%