Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 sqft	Dec. 31, 2012	Dec. 31, 2011	Nov. 30, 2013 Lawsuits
Commitments And Contingencies Disclosure [Abstract]
Area for leasing facility of manufacturing, research laboratory and office space	68,400
Expiry date of lease	Aug. 01, 2017
Renewal period for lease beyond its expiration	Three additional five-year periods
Base rent paid and the rent expensed recorded as deferred rent in balance sheet	$ 1.7
Rent expense	$ 2.8	$ 2.9	$ 2.9
Number of putative class action complaints filed in U.S District Court				2