Facility Lease - Additional Information (Detail) - California [Member] $ in Millions	1 Months Ended
	Jul. 31, 2016 USD ($)	Sep. 30, 2016 ft²
Facility Lease [Line Items]
Area for leasing facility of manufacturing, research laboratory and office space | ft²		68,400
Renewal period for lease for lease beyond its expiration	16 months
Renewal lease agreement expiry date	Dec. 31, 2018
Additional obligation incurred | $	$ 2.9