Basis of Presentation - Additional Information (Detail) - USD ($)	1 Months Ended	9 Months Ended
	Aug. 31, 2001	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Oct. 02, 2013	Apr. 26, 2013	Mar. 22, 2013	Mar. 18, 2013
Organization and Nature of Operations [Line Items]
Capital contribution made by company				$ 8,500,000	$ 3,500,000	$ 1,850,000		$ 3,150,000
Interest in economic returns							60.00%
Revenue from operations		$ 0
Net cash used in operating activities		$ (708,000)	$ (500,000)
Minimum date to operate company on basis of sufficient capital resources and liquidity		Dec. 31, 2015
McDonald's Corporation
Organization and Nature of Operations [Line Items]
Terminated relationship period with customers	25 years