Fair Value Measurement - Schedule of Fair Value Measurement (Details) - USD ($)	Sep. 30, 2015	Dec. 31, 2014
Assets:
Money market funds(1)	$ 667,284	$ 667,127
Liabilities:
Contingent consideration	(24,262,861)	(32,582,574)
Fair Value, Inputs, Level 1 [Member]
Assets:
Money market funds(1)	667,284	667,127
Liabilities:
Contingent consideration	0	0
Fair Value, Inputs, Level 2 [Member]
Assets:
Money market funds(1)	0	0
Liabilities:
Contingent consideration	0	0
Fair Value, Inputs, Level 3 [Member]
Assets:
Money market funds(1)	0	0
Liabilities:
Contingent consideration	$ (24,262,861)	$ (32,582,574)