Commitments and Contingencies - Additional Information (Detail) $ in Millions |
12 Months Ended | ||||
|---|---|---|---|---|---|
Jul. 31, 2016 |
Nov. 30, 2013
Lawsuit
|
Dec. 31, 2016
USD ($)
ft²
Renewal_Options
|
Dec. 31, 2015
USD ($)
|
Dec. 31, 2014
USD ($)
|
|
| Commitments And Contingencies Disclosure [Abstract] | |||||
| Area for leasing facility of manufacturing, research laboratory and office space | ft² | 68,400 | ||||
| Renewal lease agreement expiry date | Dec. 31, 2018 | ||||
| Number of additional renewals for lease beyond its expiration | Renewal_Options | 3 | ||||
| Renewal period for lease for lease beyond its expiration | 16 months | 5 years | |||
| Base rent paid and the rent expensed recorded as deferred rent in balance sheet | $ 0.2 | ||||
| Rent expense | $ 2.6 | $ 2.8 | $ 2.8 | ||
| Number of putative, securities class action complaints filed in U.S District Court | Lawsuit | 2 | ||||