Commitments - Additional Information (Detail) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2016	Jun. 30, 2015
Contractual Obligation [Line Items]
Agreement for purchase of equipment		$ 2,585,000	$ 3,400,000
Laboratory and Computer Equipment [Member]
Contractual Obligation [Line Items]
Agreement for purchase of equipment	$ 2,200,000	$ 2,400,000
Interest rate	1.40%	1.40%
Laboratory and Computer Equipment [Member] | 36 Month Term [Member]
Contractual Obligation [Line Items]
Lease term period		36 months
Buyout option	$ 1.00	$ 1.00
Interest rate	13.70%	13.70%