Leases - The Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jul. 28, 2019	Jul. 28, 2019
Leases [Abstract]
Operating lease cost	$ 1,214	$ 2,428
Short-term lease cost	83	161
Sublease income	(32)	(65)
Total lease cost	$ 1,265	$ 2,524