CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net loss	$ (3,943,819)	$ (6,312,606)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation expense	18,283	14,604
Non-cash interest expense	14,749	695,469
Non-cash lease expense	47,696	73,273
Change in fair value of derivative liability	0	776,273
Stock-based compensation expense	222,513	415,202
Changes in assets and liabilities:
Prepaid expenses and other assets	227,870	49,555
Accounts payable and accrued expenses	(1,225,853)	1,723,507
Lease obligations	(47,862)	(102,488)
Net cash used in operating activities	(4,686,423)	(2,667,211)
Cash flows from investing activities
Purchase of property and equipment	(52,653)	(10,581)
Net cash used in investing activities	(52,653)	(10,581)
Cash flows from financing activities
Financing lease principal payments	(5,964)	(5,964)
Payment of debt issuance costs	(5,740)	(85,233)
Proceeds from issuance of debt	500,000	1,450,000
Net cash provided by financing activities	488,296	1,358,803
Effect of changes in exchange rate on cash	0	(282)
Net decrease in cash, cash equivalents and restricted cash	(4,250,780)	(1,319,271)
Cash, cash equivalents and restricted cash at beginning of period	7,595,068	1,778,613
Cash, cash equivalents and restricted cash at end of period	3,344,288	459,342
Supplemental disclosure of non-cash transactions:
Right-of-use asset related to operating leases (Note 8)	$ 0	$ 427,751