Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities
Net loss	$ (5,361)	$ (12,663)
Adjustments to reconcile net loss to net cash used in operating activities:
Change in fair value of investment	(3,827)	7,352
Research and development-acquired license, expensed	1,128	1,154
Stock-based compensation	314
Realized gain on marketable securities	(501)	(97)
Unrealized loss on marketable securities	4,296	781
Changes in operating assets and liabilities:
Prepaid expenses and other assets	(429)	135
Accounts payable and accrued expenses	5	30
Accrued salaries and benefits	(73)	(321)
Interest receivable on convertible note	(107)
Payable to DatChat		50
Net cash used in operating activities	(4,555)	(3,579)
Cash flows from investing activities
Purchase of marketable securities	(90,541)	(98,524)
Sale of marketable securities	30,439	72,008
Proceeds from sale of Hoth common shares		460
Proceeds from sale of DatChat common shares	900
Funds to deposit accounts, net	(4,420)
Purchase of investments	(4,066)
Purchase of research and development licenses	(597)	(1,154)
Purchase of convertible note	(2,000)
Net cash used in investing activities	(70,285)	(27,210)
Cash flows from financing activities
Proceeds from issuance of common stock and warrants, net of offering cost	77,989	6,559
Proceeds from issuance of common stock, net of offering cost		17,845
Proceeds from exercise of warrants	84	7,204
Net cash provided by financing activities	78,073	31,608
Net increase in cash and cash equivalents	3,233	819
Cash and cash equivalents, beginning of period	2,715	91
Cash and cash equivalents, end of period	5,948	910
Non-cash investing and financing activities
Distribution of Hoth common stock		$ 269
Unpaid investment	$ 1,000