Acquisitions - Allocation of Acquired Intangible Assets and Related Estimates of Useful Lives (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended	0 Months Ended
Aug. 31, 2013	Mar. 12, 2013 Alter [Member]	Mar. 12, 2013 Alter [Member] Current Developed Technology [Member]	Mar. 12, 2013 Alter [Member] Trademarks and Trade Names [Member]	Aug. 29, 2012 Plasmart, Inc. [Member]	Aug. 29, 2012 Plasmart, Inc. [Member] Current Developed Technology [Member]	Aug. 29, 2012 Plasmart, Inc. [Member] Trade Names [Member]	Aug. 29, 2012 Plasmart, Inc. [Member] Customer Relationships [Member]	Aug. 29, 2012 Minimum [Member] Plasmart, Inc. [Member] Current Developed Technology [Member]	Aug. 29, 2012 Maximum [Member] Plasmart, Inc. [Member] Current Developed Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets	$ 268	$ 2,806	$ 2,208	$ 598	$ 10,745	$ 5,029	$ 335	$ 5,381
Estimated useful life of finite lived intangible assets			9 years	3 years			7 years	10 years	7 years 6 months	9 years 6 months

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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration