Related-Party Transactions - Leases (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	May 31, 2020	Dec. 31, 2019
Related Party Transaction [Line Items]
Operating lease rent expenses	$ 901,042	$ 102,152	$ 1,660,415	$ 189,409
ARE East River Science Park LLC [Member]
Related Party Transaction [Line Items]
Operating lease, right of use asset write-off						$ 825,888
Operating lease liability write-off	969,477		969,477
Net gain on write-off of operating lease right of use asset and liability			143,589
Operating lease rent expenses	0	121,888	81,260	243,776
Letter of credit outstanding amount					$ 122,866
Kadmon Corporation LLC [Member]
Related Party Transaction [Line Items]
Cash payment	149,435	144,101	295,190	284,894
Amount due under services agreement	0		0			$ 0
Kadmon Corporation LLC [Member] | Loss from operations
Related Party Transaction [Line Items]
Operating lease rent expenses	$ 149,435	$ 144,101	$ 295,190	$ 284,894