Quarterly report pursuant to Section 13 or 15(d)

Commitments - Additional Information (Detail)

v3.20.1
Commitments - Additional Information (Detail)
1 Months Ended
Jan. 31, 2012
ft²
ExtensionOptions
Dec. 31, 2011
ExtensionOptions
Dec. 31, 2010
Jan. 01, 2019
Loss Contingencies [Line Items]        
Non-cancellable operating lease, expiration date 2027-12   2025-12  
Extended lease agreement, date   2027-12    
Number of lease extension options | ExtensionOptions 2 2    
Lease renewal termination period 5 years 5 years    
Area of space relinquished from lease agreement | ft² 10,912      
Operating lease, remaining lease term       9 years
Operating lease, discount rate, percent       9.93%