Condensed Consolidated Balance Sheets - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 23,488,195	$ 41,671,284
Prepaid expenses and other current assets	792,230	1,075,021
Total current assets	24,280,425	42,746,305
Property and equipment, net	186,034	130,867
Other assets:
Goodwill	7,647,267	7,647,267
In-process research and development	118,600	118,600
Other non-current assets	568,965	20,380
Total assets	32,801,291	50,663,419
Current liabilities:
Accounts payable	1,538,832	1,033,829
Accrued expenses	3,171,983	4,546,432
Other current liabilities	226,421
Total current liabilities	4,937,236	5,580,261
Other non-current liabilities	311,544
Total liabilities	5,248,780	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; 10,095,176 and 10,087,363 shares issued and outstanding at June 30, 2019 and December 31, 2018, respectively	1,010	1,009
Additional paid-in capital	93,394,256	91,914,692
Accumulated deficit	(65,842,755)	(46,832,543)
Total stockholders’ equity	27,552,511	45,083,158
Total liabilities and stockholders’ equity	$ 32,801,291	$ 50,663,419