Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Nov. 02, 2019	Nov. 03, 2018	Nov. 02, 2019	Nov. 03, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (7,190,000)	$ (2,005,000)	$ (10,233,000)	$ (6,300,000)
Other comprehensive income before taxes:
Recognition of accumulated foreign currency translation adjustment	792,000		792,000
Foreign currency translation	2,000	(7,000)	(81,000)	(246,000)
Pension plans	196,000	165,000	588,000	495,000
Other comprehensive income before taxes	990,000	158,000	1,299,000	249,000
Tax provision related to items of other comprehensive income	(70,000)	(45,000)	(151,000)	(92,000)
Other comprehensive income, net of tax	920,000	113,000	1,148,000	157,000
Comprehensive loss	$ (6,270,000)	$ (1,892,000)	$ (9,085,000)	$ (6,143,000)