Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities
Net loss	$ (7,171)	$ (12,337)
Adjustments to reconcile net loss to net cash used in operating activities:
Change in fair value of investment	(3,626)	6,811
Research and development-acquired license, expensed	1,148	1,469
Stock-based compensation	314	84
Realized loss (gain) on marketable securities	67	(509)
Unrealized loss on marketable securities	3,115	218
Changes in operating assets and liabilities:
Prepaid expenses and other assets	(227)	(34)
Accounts payable and accrued expenses	(186)	499
Accrued salaries and benefits	370	(372)
Interest receivable on convertible note	(252)
Security deposit	(155)
Payable to DatChat		150
Net cash used in operating activities	(6,603)	(4,021)
Cash flows from investing activities
Purchase of marketable securities	(93,432)	(98,827)
Sale of marketable securities	103,043	74,873
Proceeds from sale of Hoth common shares		460
Proceeds from sale of DatChat common shares	900
Funds to deposit accounts, net	(4,201)
Purchase of short-term investments	(5,666)
Purchase of research and development licenses	(617)	(1,469)
Purchase of convertible note	(2,000)
Purchase of short-term notes	(6,880)
Net cash used in investing activities	(8,853)	(24,963)
Cash flows from financing activities
Proceeds from issuance of common stock and warrants, net of offering cost	78,219	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	78,303	31,608
Net increase in cash and cash equivalents	62,847	2,624
Cash and cash equivalents, beginning of period	2,715	91
Cash and cash equivalents, end of period	65,562	2,715
Non-cash investing and financing activities
Distribution of Hoth common stock		$ 269