Segment Information - Net Sales Activity by Geographic Region (Details) - Net sales [Member]	3 Months Ended		9 Months Ended
	Oct. 28, 2018	Oct. 29, 2017	Oct. 28, 2018	Oct. 29, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Asia-Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	77.00%	75.00%	74.00%	74.00%
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	16.00%	21.00%	26.00%	21.00%
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	7.00%	8.00%	7.00%	8.00%
Other: Warrant Shares
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	(0.00%)	(4.00%)	(7.00%)	(3.00%)