Condensed Consolidated Balance Sheets - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 122,513,357	$ 130,088,869
Prepaid expenses and other current assets	2,090,941	2,955,878
Total current assets	124,604,298	133,044,747
Property and equipment, net	45,934	41,639
Right of use lease asset	445,538	521,392
Other noncurrent assets	29,360	107
Total assets	125,125,130	133,607,885
Current liabilities:
Accounts payable	3,006,688	2,176,852
Accrued expenses	8,298,769	6,642,553
Lease liability—current	238,771	242,329
Total current liabilities	11,544,228	9,061,734
Lease liability—noncurrent	227,288	302,621
Total liabilities	11,771,516	9,364,355
Commitments and contingencies (Note 7)
Stockholders’ equity:
Common stock, $0.001 par value, 400,000,000 shares authorized, 21,054,872 and 21,022,752 shares issued and outstanding at March 31, 2020 and December 31, 2019 , respectively.	21,055	21,023
Additional paid-in capital	227,219,510	226,284,548
Accumulated other comprehensive loss	(13,958,431)	(11,533,778)
Accumulated deficit	(99,928,520)	(90,528,263)
Total stockholders’ equity	113,353,614	124,243,530
Total liabilities and stockholders’ equity	$ 125,125,130	$ 133,607,885