Fair Value Measurement - Schedule of Fair Value Measurement (Details) - USD ($)	Jun. 30, 2016	Dec. 31, 2015
Assets:
Money market funds(1)	$ 0	$ 667,211
Liabilities:
Contingent consideration	(18,560,310)	(22,161,822)
Fair Value, Inputs, Level 1 [Member]
Assets:
Money market funds(1)	0	667,211
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	$ (18,560,310)	$ (22,161,822)