Other Income (Expenses) - Schedule of Other Income (Expenses) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Other Income and Expenses [Abstract]
Change in fair value of derivative liability	$ 23	$ 13	$ 73	$ 6
Foreign exchange gain (losses)	6	21	(20)	(357)
Interest income	128	12	249	27
Miscellaneous	7	(4)	(15)	(6)
Other income (expenses)	$ 164	$ 42	$ 287	$ (330)