Organization, Business and Basis of Presentation - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Dec. 31, 2013
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Cash flow from operating activities excluded due from related parties	$ (3,816,480)	$ (3,360)
Cash and cash equivalents	4,390,783	$ 10,281,362	$ 10,367,993	$ 1,147,198
Working capital	11,139,704		$ 13,147,257
Decrease in working capital	$ (2,007,553)