Summary of Significant Accounting Policies Change in Accounting Principle (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 29, 2020	Feb. 23, 2019	Feb. 29, 2020	Feb. 23, 2019	Nov. 07, 2019	Sep. 01, 2019	Aug. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of goods sold	$ 141,707	$ 74,145	$ 231,654	$ 143,156
Distribution		0		0
General and administrative	28,103	13,732	46,248	25,730
Depreciation and amortization	4,287	1,902	6,740	3,751
New accounting pronouncements
Operating lease, right-of-use asset	27,072		27,072
Operating lease, liability, current	3,947		3,947
Operating lease, liability, noncurrent	23,842		23,842
Finance lease, right-of-use asset	1,049		1,049
Finance lease, liability, current	264		264				$ 0
Finance lease, liability, noncurrent	$ 786		$ 786
Change in Accounting Principle and Presentation
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of goods sold		7,979		15,170
Distribution		(5,797)		(11,081)
General and administrative		(2,145)		(4,016)
Depreciation and amortization		(37)		(74)
Other Operating Income (Expense) [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of Revenue		0		0
Distribution		0		0
General and administrative		22		22
Depreciation and amortization		0		0
As Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of goods sold		66,166		127,986
Distribution		5,797		11,081
General and administrative		15,855		29,724
Depreciation and amortization		$ 1,939		$ 3,825
Other long-term assets
New accounting pronouncements
Operating lease, right-of-use asset					$ 21,100	$ 5,100
Accrued expenses and other current liabilities
New accounting pronouncements
Operating lease, liability, current					2,000	2,000
Other long-term liabilities
New accounting pronouncements
Operating lease, liability, noncurrent					$ 18,900	3,800
Property and equipment
New accounting pronouncements
Finance lease, right-of-use asset						1,200
Current maturities of long-term debt
New accounting pronouncements
Finance lease, liability, current						200
Long-term debt
New accounting pronouncements
Finance lease, liability, noncurrent						$ 1,000