Acquisition and Divestitures - Acquired Intangible Assets and Related Estimated Useful Lives (Detail) - USD ($) $ in Thousands	1 Months Ended	6 Months Ended
May. 31, 2015	Jun. 30, 2015
Business Acquisition [Line Items]
Weighted average useful life		7 years 2 months 12 days
UreSil, LLC [Member]
Business Acquisition [Line Items]
Allocated fair value	$ 545
UreSil, LLC [Member] \| Non-Compete Agreement [Member]
Business Acquisition [Line Items]
Allocated fair value	$ 120
Weighted average useful life	5 years
UreSil, LLC [Member] \| Tradename License [Member]
Business Acquisition [Line Items]
Allocated fair value	$ 17
Weighted average useful life	3 years
UreSil, LLC [Member] \| Technology [Member]
Business Acquisition [Line Items]
Allocated fair value	$ 391
Weighted average useful life	7 years
UreSil, LLC [Member] \| Customer Relationships [Member]
Business Acquisition [Line Items]
Allocated fair value	$ 17
Weighted average useful life	7 years

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275

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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

Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472

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