Condensed Consolidated Balance Sheets (Unaudited) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 32,515,833	$ 21,412,623
Marketable securities		24,441,520
Restricted cash	100,000	100,000
Prepaid expenses and other current assets	2,374,294	1,182,483
Total current assets	34,990,127	47,136,626
Equipment, net	2,911	16,011
Other noncurrent assets	14,808	14,808
Operating lease right-of-use assets	143,465	261,952
In-process research and development	15,200,000	15,200,000
Goodwill	14,869,399	14,869,399
Total assets	65,220,710	77,498,796
Current liabilities
Accounts payable	701,585	2,317,004
Accrued expenses and other current liabilities	4,535,910	4,139,163
Operating leases	156,956	172,901
Total current liabilities	5,394,451	6,629,068
Deferred taxes	1,803,356	1,803,356
Deferred revenue		41,175,600
Noncurrent operating leases		111,229
Total liabilities	7,197,807	49,719,253
Commitments and contingencies (Note 8)
Stockholders’ equity
Preferred stock; $0.0001 par value; 100,000,000 shares authorized; none issued or outstanding as of September 30, 2020 and December 31, 2019, respectively
Common stock; $0.0001 par value; 125,000,000 shares authorized; 42,674,491 and 39,084,121 shares issued and outstanding as of September 30, 2020 and December 31, 2019, respectively	4,267	3,908
Additional paid-in capital	335,489,256	314,511,853
Accumulated deficit	(277,470,620)	(286,736,218)
Total stockholders’ equity	58,022,903	27,779,543
Total liabilities and stockholders’ equity	$ 65,220,710	$ 77,498,796