For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Concentration of Risk - Additional Information (Detail) - Customer Concentration Risk [Member] - Freedom Roads, LLC	3 Months Ended		12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Jul. 31, 2018
Net Sales
Concentration Risk [Line Items]
Concentration risk percentage	24.00%	23.00%
Accounts Receivable
Concentration Risk [Line Items]
Concentration risk percentage	24.00%		26.00%