Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information (Detail)

v3.3.0.814
Commitments and Contingencies - Additional Information (Detail)
3 Months Ended 9 Months Ended
Nov. 08, 2013
ft²
Sep. 30, 2015
USD ($)
Sep. 30, 2014
USD ($)
Sep. 30, 2015
USD ($)
Sep. 30, 2014
USD ($)
Dec. 31, 2014
USD ($)
Loss Contingencies [Line Items]            
Rent expenses   $ 100,000 $ 200,000 $ 100,000 $ 200,000  
Accrued in the balance sheets related to indemnification obligations   0   0    
Indemnification liabilities   $ 0   $ 0   $ 0
New Lease Agreement [Member]            
Loss Contingencies [Line Items]            
Lease start date Jan. 16, 2014          
Lease expiration date Dec. 31, 2018          
Area of office space | ft² 8,894