Goodwill and Intangible Assets - Summary of Company's Intangible Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Finite Lived Intangible Assets [Line Items]
Cost	$ 12,204	$ 12,202
Accumulated Amortization	(6,636)	(5,494)
Net Carrying Amount	5,568	6,707
Technology [Member]
Finite Lived Intangible Assets [Line Items]
Cost	5,770	5,770
Accumulated Amortization	(4,659)	(3,826)
Net Carrying Amount	1,111	1,944
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Cost	5,684	5,682
Accumulated Amortization	(1,378)	(1,183)
Net Carrying Amount	4,306	4,499
Non-Competition Agreements [Member]
Finite Lived Intangible Assets [Line Items]
Cost	380	380
Accumulated Amortization	(296)	(232)
Net Carrying Amount	84	148
Tradenames - Finite Life [Member]
Finite Lived Intangible Assets [Line Items]
Cost	370	370
Accumulated Amortization	(303)	(253)
Net Carrying Amount	$ 67	$ 117