Goodwill and Intangible Assets - Summary of Company's Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Finite Lived Intangible Assets [Line Items]
Cost	$ 12,212	$ 12,218
Accumulated Amortization	(4,936)	(3,234)
Net Carrying Amount	7,276	8,984
Technology [Member]
Finite Lived Intangible Assets [Line Items]
Cost	5,770	5,770
Accumulated Amortization	(3,409)	(2,159)
Net Carrying Amount	2,361	3,611
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Cost	5,692	5,698
Accumulated Amortization	(1,098)	(816)
Net Carrying Amount	4,594	4,882
Non-Competition Agreements [Member]
Finite Lived Intangible Assets [Line Items]
Cost	380	380
Accumulated Amortization	(201)	(106)
Net Carrying Amount	179	274
Tradenames - Finite Life [Member]
Finite Lived Intangible Assets [Line Items]
Cost	370	370
Accumulated Amortization	(228)	(153)
Net Carrying Amount	$ 142	$ 217