Goodwill and Intangible Assets - Summary of Company's Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Finite Lived Intangible Assets [Line Items]
Cost	$ 12,194	$ 12,202
Accumulated Amortization	(7,195)	(5,494)
Net Carrying Amount	4,999	6,707
Technology [Member]
Finite Lived Intangible Assets [Line Items]
Cost	5,770	5,770
Accumulated Amortization	(5,076)	(3,826)
Net Carrying Amount	694	1,944
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Cost	5,674	5,682
Accumulated Amortization	(1,464)	(1,183)
Net Carrying Amount	4,210	4,499
Non-Competition Agreements [Member]
Finite Lived Intangible Assets [Line Items]
Cost	380	380
Accumulated Amortization	(327)	(232)
Net Carrying Amount	53	148
Tradenames - Finite Life [Member]
Finite Lived Intangible Assets [Line Items]
Cost	370	370
Accumulated Amortization	(328)	(253)
Net Carrying Amount	$ 42	$ 117