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Fair Value Measurements - Additional Information (Detail) - USD ($)
Oct. 28, 2017
Jan. 28, 2017
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Non-financial assets recognized at fair value $ 0 $ 0
Non-financial liabilities recognized at fair value 0 0
Total long-term debt principal 68,076,000 $ 50,200,000
Level 2 [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Fair value of outstanding debt $ 58,000,000