Goodwill and Intangible Assets - Changes to Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 2,910	$ 2,910
Foreign currency translation adjustment	(258)	(178)
Accumulated amortization	(1,213)	(1,134)
Balance	1,439	1,598
Trademark [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	300	300
Foreign currency translation adjustment	(27)	(19)
Accumulated amortization	(232)	(215)
Balance	41	66
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	1,370	1,370
Foreign currency translation adjustment	(121)	(83)
Accumulated amortization	(571)	(538)
Balance	678	749
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	1,240	1,240
Foreign currency translation adjustment	(110)	(76)
Accumulated amortization	(410)	(381)
Balance	$ 720	$ 783