Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information (Detail)

v2.4.0.8
Commitments and Contingencies - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
6 Months Ended
Jun. 30, 2014
Lease
Jun. 30, 2013
Commitments And Contingencies Disclosure [Abstract]    
Number of leases 3  
Expenses incurred for the properties listed $ 0.2 $ 0.2