Interim Condensed Consolidated Financial Statements - Schedule of Deferred Revenue Balance (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 6,168	$ 4,877
Product Revenues [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	4,455	2,831
Service Revenues [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	448	566
Regional Growth Fund [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 1,265	$ 1,480