Goodwill and Intangible Assets - Summary of Company's Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Finite Lived Intangible Assets [Line Items]
Cost	$ 12,189	$ 12,202
Accumulated Amortization	(6,051)	(5,494)
Net Carrying Amount	6,138us-gaap_FiniteLivedIntangibleAssetsNet	6,707us-gaap_FiniteLivedIntangibleAssetsNet
Technology [Member]
Finite Lived Intangible Assets [Line Items]
Cost	5,770	5,770
Accumulated Amortization	(4,242)	(3,826)
Net Carrying Amount	1,528	1,944
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Cost	5,669	5,682
Accumulated Amortization	(1,267)	(1,183)
Net Carrying Amount	4,402	4,499
Non-Competition Agreements [Member]
Finite Lived Intangible Assets [Line Items]
Cost	380	380
Accumulated Amortization	(264)	(232)
Net Carrying Amount	116	148
Tradenames - Finite Life [Member]
Finite Lived Intangible Assets [Line Items]
Cost	370	370
Accumulated Amortization	(278)	(253)
Net Carrying Amount	$ 92	$ 117

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

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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