Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities
Net loss	$ (50,811,138)	$ (24,402,590)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	6,281,555	2,144,866
Non-cash research and development license expense	7,155,337
Amortization of debt discount	356,664	294,818
Depreciation	10,960	22,549
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	275,914	431,447
Other assets		(56,624)
Accounts payable	(1,580,100)	2,449,875
Accrued expenses and other current liabilities	(3,857,658)	934,659
Net cash used in operating activities	(42,168,466)	(18,181,000)
Cash flows from investing activities
Purchases of equipment	(10,759)	(11,464)
Net cash used in investing activities	(10,759)	(11,464)
Cash flows from financing activities
Procceds from issuance of common stock upon financing, net	12,074,999	44,455,380
Proceeds from issuance of term loan		20,000,000
Repayment of principal on term loan		(7,238,889)
Proceeds from issuance of common stock upon exercise of options	820,165	615,498
Proceeds issuance of common stock upon exercise of warrants	3	144,870
Net cash (used in) provided by financing activities	12,895,167	57,976,859
Net (decrease) increase in cash	(29,284,058)	39,784,395
Cash at beginning of period	219,966,167	13,968,742
Cash at end of period	190,682,109	53,753,137
Supplemental disclosures of cash flow information:
Interest paid	$ 762,501	595,833
Supplemental disclosures of non-cash financing activity:
Issuance of warrants in connection with debt financing		$ 387,000