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Segment, Customers, and Geographic Information - Major Customer Accounts Receivable as Percentage of Accounts Receivable (Detail) - Accounts Receivable [Member] - Credit Concentration Risk [Member]	3 Months Ended	12 Months Ended
	Sep. 30, 2018	Jun. 30, 2018
Customer A [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	21.00%	10.00%
Customer B [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage	14.00%	13.00%
Customer C [Member]
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage		11.00%

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
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