Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities
Net loss	$ (5,314)	$ (10,646)
Adjustments to reconcile net loss to net cash used in operating activities:
Change in fair value of investment	898	6,730
Research and development-acquired license, expensed	1,125	1,113
Stock-based compensation	175
Realized gain on marketable securities	(1,084)	(544)
Unrealized loss on marketable securities	1,395	614
Changes in assets and liabilities:
Prepaid expenses and other assets	39	76
Accounts payable and accrued expenses	(248)	608
Accrued salaries and benefits	423	(389)
Interest receivable on convertible note	(67)
Payable to DatChat		50
Net cash used in operating activities	(2,658)	(2,388)
Cash flows from investing activities
Purchase of marketable securities	(86,497)	(78,042)
Sale of marketable securities	23,155	52,215
Sale of Hoth common shares		460
Funds to deposit accounts, net	(4,476)
Purchase of research and development licenses	(594)	(1,113)
Purchase of convertible note	(2,000)
Net cash used in investing activities	(70,412)	(26,480)
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	5,003	2,740
Cash and cash equivalents, beginning of period	2,715	91
Cash and cash equivalents, end of period	$ 7,718	$ 2,831