Related Party Transactions - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Jul. 16, 2015 USD ($) contract	Dec. 31, 2014 USD ($)
Consulting | Officer
Related Party Transaction [Line Items]
Transaction expenses incurred by parent company	$ 44,000	$ 50,000	$ 156,000	$ 121,000
Outstanding payables due to related party	19,000		19,000			$ 8,000
Software Licensing and Subscription | Officer
Related Party Transaction [Line Items]
Quarterly software licensing fee	20,000
Deferred costs related to annual software subscription	$ 60,000		$ 60,000			$ 0
Non-cancellable Operating Leases | Employee
Related Party Transaction [Line Items]
Number of contracts | contract					2
Term of contract			15 years
Aggregate annual rental payments					$ 45,000