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Fair Value Measurements (Details) - USD ($)
3 Months Ended 12 Months Ended
May 02, 2020
May 04, 2019
Feb. 01, 2020
Fair value measurements      
Carrying value $ 476,000   $ 510,000
Impairment charge 264,000 $ 0 311,000
Impairment charge that reduced carrying value 200,000    
Level 3      
Fair value measurements      
Fair value measured using Level 3 inputs $ 212,000   $ 199,000