Related Party Transactions - Additional Information (Detail) (Consulting Services [Member], USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Consulting Services [Member]
Related Party Transaction [Line Items]
Outstanding payables due to related party	$ 12,000	$ 6,000
Transaction expenses incurred by parent company	$ 200,000	$ 200,000	$ 200,000