Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Operating activities:
Net loss	$ (11,313)	$ (9,169)
Adjustments to reconcile net loss to net cash flows from operating activities:
Depreciation and amortization	76	68
Unrealized gain from convertible loan		(61)
Non-cash and accrued interest		(9)
Share-based compensation expense	1,386	1,937
Changes in assets and liabilities:
Prepaid expenses and other assets	177	222
Other payables and accrued liabilities	320	(240)
Net cash flows from operating activities	(9,354)	(7,252)
Investing activities:
Purchase of property and equipment	(69)	(91)
Investment in convertible loan		(200)
Proceeds from sale of investment	270
Purchase of marketable securities		(4,998)
Proceeds from sales of marketable security	2,999	2,521
Net cash flows from investing activities	3,200	(2,768)
Financing activities:
Repayment of shareholders investment		(3,375)
Net cash flows from financing activities		(3,375)
Decrease in cash, cash equivalents and restricted cash	(6,154)	(13,395)
Cash, cash equivalents and restricted cash at beginning of period	19,734	33,129
Cash, cash equivalents and restricted cash at ending of period	13,580	19,734
Supplemental disclosure of cash flow information:
Interest paid from litigation		236
Cash received from interest	1	32
Right-of-use assets and lease liability	$ 69