Commitments and Contingencies - Additional Information (Detail) (USD $)	6 Months Ended
	Jun. 30, 2014
Microline [Member]
Operating Leased Assets [Line Items]
Amount due in milestone fees for contract development	$ 1,400,000
Corporate offices [Member]
Operating Leased Assets [Line Items]
Lease expiration date	Jun. 30, 2018
Operating lease agreement period	5 years
Operating lease amended extension period	3 years 2 months
Operating lease, renew option period	3 years
Warehouse [Member]
Operating Leased Assets [Line Items]
Operating lease agreement period	4 years 4 months
Operating lease additional renewed period	6 years