Related-Party Transactions - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended			0 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Oct. 07, 2013 IPO	Sep. 30, 2013 IPO	Sep. 30, 2013 IPO	Sep. 30, 2014 Advertising Funds	Sep. 30, 2013 Advertising Funds	Sep. 30, 2014 Advertising Funds	Sep. 30, 2013 Advertising Funds	Sep. 30, 2013 Tails Inc.	Sep. 30, 2013 Tails Inc.	Sep. 30, 2014 Tails Inc.	Dec. 31, 2013 Tails Inc.
Related Party Transaction [Line Items]
Related party transactions expenses									$ 291,000	$ 286,000	$ 862,000	$ 859,000	$ 97,000	$ 244,000
Accounts payable to affiliates	1,089,000		1,089,000		1,017,000										988,000	945,000
Franchise revenue		912,000		2,648,000
Amounts allocated for services rendered and rent for office space	549,000	838,000	1,661,000	2,459,000
Payments of Stock Issuance Costs			$ 0	$ 4,816,000		$ 632,500	$ 76,000	$ 216,000