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)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
USD ($)
Lease
Sep. 30, 2014
USD ($)
Sep. 30, 2015
USD ($)
Lease
Sep. 30, 2014
USD ($)
Commitments and Contingencies Disclosure [Abstract]        
Number of leases 4   4  
Expenses incurred for the properties listed | $ $ 0.1 $ 0.3 $ 0.1 $ 0.3