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Fair Value Measurements (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Oct. 31, 2020
Nov. 02, 2019
Oct. 31, 2020
Nov. 02, 2019
Feb. 01, 2020
Fair value measurements          
Carrying value $ 682,000   $ 682,000   $ 510,000
Impairment charge 181,000 $ 0 445,000 $ 311,000 311,000
Impairment charge that reduced carrying value     300,000    
Level 3          
Fair value measurements          
Fair value measured using Level 3 inputs $ 237,000   $ 237,000   $ 199,000