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Goodwill and Intangible Assets - Components of Identifiable Intangible Assets (Detail) - USD ($)
$ in Thousands
Dec. 27, 2018
Jun. 28, 2018
Dec. 28, 2017
Finite-Lived Intangible Assets [Line Items]      
Total intangible assets, gross $ 38,360 $ 38,360 $ 38,360
Less accumulated amortization:      
Total accumulated amortization (22,390) (20,706) (19,019)
Net intangible assets 15,970 17,654 19,341
Customer Relationships [Member] | Squirrel Brand [Member]      
Finite-Lived Intangible Assets [Line Items]      
Total intangible assets, gross 21,100 21,100 21,100
Less accumulated amortization:      
Total accumulated amortization (13,494) (12,182) (10,867)
Brand Names [Member] | Squirrel Brand [Member]      
Finite-Lived Intangible Assets [Line Items]      
Total intangible assets, gross 16,990 16,990 16,990
Less accumulated amortization:      
Total accumulated amortization (8,838) (8,492) (8,148)
Non-compete Agreement [Member] | Squirrel Brand [Member]      
Finite-Lived Intangible Assets [Line Items]      
Total intangible assets, gross 270 270 270
Less accumulated amortization:      
Total accumulated amortization $ (58) $ (32) $ (4)