Intangible Assets, Net (Detail) - Intangible Assets, Net (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]
Carrying amount	$ 7,393	$ 4,848
Accumulated amortization	(3,867)	(3,130)
Net carrying amount	3,526us-gaap_FiniteLivedIntangibleAssetsNet	1,718us-gaap_FiniteLivedIntangibleAssetsNet
Proprietary data and models
Acquired Finite-Lived Intangible Assets [Line Items]
Carrying amount	2,100	1,500
Accumulated amortization	(1,119)	(637)
Net carrying amount	981	863
Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Carrying amount	1,890	1,890
Accumulated amortization	(1,565)	(1,184)
Net carrying amount	325	706
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Carrying amount	433	728
Accumulated amortization	(433)	(625)
Net carrying amount	0	103
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Carrying amount	1,050	250
Accumulated amortization	(392)	(215)
Net carrying amount	658	35
Covenant not to compete
Acquired Finite-Lived Intangible Assets [Line Items]
Carrying amount	1,920	480
Accumulated amortization	(358)	(469)
Net carrying amount	$ 1,562	$ 11

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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- Definition

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+ References

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+ References

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