Goodwill, In-Process Research and Development and Intellectual Property - Carrying Value of Company's IPR&D Assets and Change in Balance (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($)
Finite-Lived Intangible Assets [Line Items]
Beginning balance	$ 15,920
Ending balance	16,161
In-Process Research and Development [Member]
Finite-Lived Intangible Assets [Line Items]
Beginning balance	15,920
Foreign currency translation impact	241
Ending balance	$ 16,161