Condensed Consolidated Balance Sheets - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 31,831,427	$ 41,671,284
Prepaid expenses and other current assets	778,738	1,075,021
Total current assets	32,610,165	42,746,305
Property and equipment, net	210,257	130,867
Other assets:
Goodwill	7,647,267	7,647,267
In-process research and development	118,600	118,600
Other non-current assets	430,251	20,380
Total assets	41,016,540	50,663,419
Current liabilities:
Accounts payable	61,167	1,033,829
Accrued expenses	2,759,122	4,546,432
Other current liabilities	164,629
Total current liabilities	2,984,918	5,580,261
Other non-current liabilities	245,242
Total liabilities	3,230,160	5,580,261
Commitments and Contingencies (Note 6)
Stockholders’ equity:
Preferred stock, $0.0001 par value; authorized 10,000,000 shares; none issued and outstanding	0	0
Common stock, $0.0001 par value; authorized 150,000,000 shares; 10,087,363 shares issued and outstanding at March 31, 2019 and December 31, 2018	1,009	1,009
Additional paid-in capital	92,586,619	91,914,692
Accumulated deficit	(54,801,248)	(46,832,543)
Total stockholders’ equity	37,786,380	45,083,158
Total liabilities and stockholders’ equity	$ 41,016,540	$ 50,663,419