Annual report pursuant to Section 13 and 15(d)

Build-to-Suit Lease - Additional Information (Detail)

v3.6.0.2
Build-to-Suit Lease - Additional Information (Detail)
$ in Millions
1 Months Ended 12 Months Ended
Dec. 31, 2015
ft²
Option
Dec. 31, 2016
USD ($)
Operating Leased Assets [Line Items]    
Property leased | ft² 41,400  
Lease expiration date   Dec. 31, 2021
Operating lease expiration period 5 years  
Number of lease term extension options | Option 2  
Costs capitalized | $   $ 3.9
Maximum [Member]    
Operating Leased Assets [Line Items]    
Lease agreement, extendable lease term 10 years