Commitments and Contingencies - Additional Information (Detail) - 1 months ended Mar. 31, 2014	USD ($) ft²
Commitments and Contingencies [Line Items]
Lease agreement, term	8 years 1 month
Lease agreement, commencement date	Aug. 01, 2014
Before Amendment
Commitments and Contingencies [Line Items]
Lease agreement, space	55,694
After Amendment
Commitments and Contingencies [Line Items]
Lease agreement, space	75,594
Expansion Space
Commitments and Contingencies [Line Items]
Lease agreement, space	19,900
Annual rent expense | $	$ 361,000