Contingencies, Commitments and Legal Proceedings - Additional Information (Detail) - Purchase Agreement [Member] - Milwaukie, Oregon [Member]	3 Months Ended
Sep. 30, 2017 USD ($) ft²
Other Commitments [Line Items]
Property acquisition, area of building acquired \| ft²	32,000
Property acquisition, purchase price	$ 5,800,000
Payment of deposit related to property acquisition	$ 150,000

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.

No definition available.

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