Condensed Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net loss	$ (19,010,212)	$ (8,819,094)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	1,387,293	578,802
Depreciation	27,075	11,041
Loss on disposal of property and equipment	52,718
Changes in operating assets and liabilities
Prepaid expenses and other current assets	282,791	310,714
Accounts payable	505,003	765,198
Accrued expenses	(1,374,449)	(66,484)
Other non-current assets	(10,620)	(26,880)
Net cash used in operating activities	(18,140,401)	(7,246,703)
Cash flows from investing activities:
Purchase of property and equipment	(134,960)	(15,132)
Net cash used in investing activities	(134,960)	(15,132)
Cash flows from financing activities:
Costs associated with the issuance of common stock		(38,747)
Proceeds from the exercise of stock options	92,272
Net cash provided by (used in) financing activities	92,272	(38,747)
Net decrease in cash and cash equivalents	(18,183,089)	(7,300,582)
Cash and cash equivalents, beginning of period	41,671,284	15,644,355
Cash and cash equivalents, end of period	$ 23,488,195	$ 8,343,773