Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (4,414)	$ (3,947)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock based compensation	1,243	1,146
Net change in fair value of marketable securities	(1)	(2)
Non-cash lease expense	19	2
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	(330)	72
Accounts payable and accrued liabilities	(543)	(613)
Accounts payable - related parties	29	0
Fixed cash payments related to operating leases	(22)	(2)
Net cash used in operating activities	(4,019)	(3,344)
CASH FLOWS FROM INVESTING ACTIVITIES
Investment in trading marketable securities	(2,687)	(4,833)
Investment in available-for-sale securities	(499)	0
Proceeds from disposition of marketable securities	7,428	1,500
Net cash provided by (used in) investing activities	4,242	(3,333)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from issuance of common shares for cash, net	0	1,204
Payment of stock issuance costs	(134)	0
Proceeds from exercise of warrants	0	6,016
Repayments to related parties	0	(7)
Net cash provided by (used in) financing activities	(134)	7,213
Effect of exchange rate changes on cash	(129)	(9)
Net change in cash and cash equivalents	(40)	527
Cash and cash equivalents - beginning of period	12,162	5,783
Cash and cash equivalents - end of period	12,122	6,310
Supplemental Cash Flow Information
Cash paid for interest	0	0
Cash paid for income taxes	0	0
NON-CASH FINANCING AND INVESTING ACTIVITIES:
Initial recognition of right-of-use asset	20	97
Unrealized loss from available-for-sale securities	$ 29	$ 0