Segment Information - Net Sales Activity by Geographic Region (Details) - Net sales	3 Months Ended
	Apr. 28, 2019	Apr. 29, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	100.00%	100.00%
Asia-Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	78.00%	68.00%
North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	12.00%	27.00%
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	10.00%	9.00%
Other: Warrant Shares
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	0.00%	(4.00%)