Goodwill and Intangibles - Schedule of Carrying Amounts of Intangible Assets (Detail) $ in Thousands	8 Months Ended
	May 05, 2018 USD ($)
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	$ 61,546
Finite Lived, Accumulated Amortization	(39,763)
Finite Lived, Impairment	(10,710)
Finite Lived, Net Carrying Amount	11,073
Total intangible assets other than goodwill, Net Carrying Amount	11,073
Technology [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	10,570
Finite Lived, Accumulated Amortization	(9,994)
Finite Lived, Impairment	$ (576)
Technology [Member] | Minimum [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	3 years
Technology [Member] | Maximum [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Noncompete Agreements [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Finite Lived, Gross Carrying Amount	$ 1,300
Finite Lived, Accumulated Amortization	(1,223)
Finite Lived, Impairment	(77)
Customer Relationships [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	49,676
Finite Lived, Accumulated Amortization	(28,546)
Finite Lived, Impairment	(10,057)
Finite Lived, Net Carrying Amount	$ 11,073
Customer Relationships [Member] | Minimum [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	3 years
Customer Relationships [Member] | Maximum [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	10 years
Trade Names [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite Lived, Impairment	$ (26,900)