Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Oct. 31, 2020	Nov. 02, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (7,022,000)	$ (7,190,000)	$ (59,462,000)	$ (10,233,000)
Other comprehensive income before taxes:
Recognition of accumulated foreign currency translation adjustment		792,000		792,000
Foreign currency translation		2,000	(39,000)	(81,000)
Pension plans	247,000	196,000	742,000	588,000
Other comprehensive income before taxes	247,000	990,000	703,000	1,299,000
Tax provision related to items of other comprehensive income		(70,000)		(151,000)
Other comprehensive income, net of tax	247,000	920,000	703,000	1,148,000
Comprehensive loss	$ (6,775,000)	$ (6,270,000)	$ (58,759,000)	$ (9,085,000)