Commitments and Contingencies - Additional Information (Detail) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($) a	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) a	Sep. 30, 2015 USD ($)
Loss Contingencies [Line Items]
Lease agreement period			5 years
Capitalized leasehold costs	$ 0.7		$ 0.7
Lease agreement, term			The Company leases office space under operating leases that expire between the years 2016 to 2025.
Rent expense	$ 0.1	$ 0.5	$ 0.7	$ 0.9
Other Lawsuit [Member]
Loss Contingencies [Line Items]
Area of leasehold property held | a	60		60