Goodwill and Intangible Assets - Changes to Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 2,910	$ 2,910
Foreign currency translation adjustment	(9)	(43)
Accumulated amortization	(949)	(685)
Balance	1,952	2,182
Trademark [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	300	300
Foreign currency translation adjustment	(1)	(5)
Accumulated amortization	(179)	(127)
Balance	120	168
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	1,370	1,370
Foreign currency translation adjustment	(4)	(20)
Accumulated amortization	(454)	(333)
Balance	912	1,017
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	1,240	1,240
Foreign currency translation adjustment	(4)	(18)
Accumulated amortization	(316)	(225)
Balance	$ 920	$ 997