Other Commitments and Contingencies - Schedule of Annual Net Postretirement Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 02, 2019	Feb. 03, 2018
Commitments And Contingencies Disclosure [Abstract]
Service cost	$ 34	$ 36
Interest cost	18	20
Amortization of prior service cost	(11)	(13)
Amortization of unrecognized prior service costs	(59)	(58)
Net periodic postretirement benefit cost	$ (18)	$ (15)