XML 28 R60.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Intangible Assets - Narrative (Detail) - USD ($)
 6 Months Ended
Nov. 03, 2019
Apr. 28, 2019
Oct. 28, 2018
Intangible Assets [Line Items]      
Gross carrying amount of customer relationships $ 3,100,000 $ 3,100,000 $ 3,100,000
Gross carrying amount of non-compete agreement 2,000,000 2,000,000 2,000,000
Customer Relationships [Member]      
Intangible Assets [Line Items]      
Accumulated amortization 727,000 577,000 427,000
Remaining amortization expense for the fiscal year 151,000    
Remaining amortization expense for the second fiscal year 301,000    
Remaining amortization expense for the third fiscal year 301,000    
Remaining amortization expense for the fourth fiscal year 301,000    
Remaining amortization expense for the fifth fiscal year 301,000    
Remaining amortization expense for the fiscal year thereafter $ 1,033,000    
Weighted average remaining amortization period 8 years 1 month 6 days    
Customer Relationships [Member] | Maximum [Member]      
Intangible Assets [Line Items]      
Useful life 17 years    
Customer Relationships [Member] | Minimum [Member]      
Intangible Assets [Line Items]      
Useful life 9 years    
Non-Compete Agreement [Member]      
Intangible Assets [Line Items]      
Useful life 15 years    
Accumulated amortization $ 1,400,000 $ 1,400,000 $ 1,300,000
Remaining amortization expense for the fiscal year 38,000    
Remaining amortization expense for the second fiscal year 75,000    
Remaining amortization expense for the third fiscal year 75,000    
Remaining amortization expense for the fourth fiscal year 75,000    
Remaining amortization expense for the fifth fiscal year 75,000    
Remaining amortization expense for the fiscal year thereafter $ 302,000    
Weighted average remaining amortization period 8 years 6 months