Fair Value Measurements - Fair Value of Financial Assets and Liabilities Measured on Recurring Basis (Detail) - Recurring [Member] - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Assets
Money market funds	$ 33,463	$ 36,779
Liabilities
Contingent consideration	963	1,074
Debt	15,104	12,204
Fair Value Measured Using - (Level 1) [Member]
Assets
Money market funds	33,463	36,779
Liabilities
Contingent consideration	0	0
Debt	0	0
Fair Value Measured Using - (Level 2) [Member]
Assets
Money market funds	0	0
Liabilities
Contingent consideration	0	0
Debt	15,104	12,204
Fair Value Measured Using - (Level 3) [Member]
Assets
Money market funds	0	0
Liabilities
Contingent consideration	963	1,074
Debt	$ 0	$ 0

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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Fair value of contingent consideration in a business combination that is classified in shareholders' equity.

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- Definition

Fair value of financial and nonfinancial obligations.

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