Segment Information - Revenue by Sales Channel (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 28, 2019	Apr. 29, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 131,354	$ 130,429
Distributor
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	81,147	111,340
Direct
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	50,207	40,590
Other: Warrant Shares
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue offset	$ 0	$ (21,501)