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Interim Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Operating activities:    
Net loss $ (6,702) $ (4,899)
Adjustments to reconcile net loss to net cash flows from operating activities:    
Depreciation and amortization 44 32
Non-cash and accrued interest 1 (1)
Share-based compensation expense 861 709
Changes in assets and liabilities:    
Prepaid expenses and other assets 49 92
Other payables and accrued liabilities (384) (224)
Net cash flows from operating activities (6,131) (4,291)
Investing activities:    
Purchases of property and equipment (78) (11)
Proceeds from sales of investment 270
Net cash flows from investing activities (78) 259
Decrease in cash, cash equivalents and restricted cash (6,209) (4,032)
Cash, cash equivalents and restricted cash at beginning of period 13,580 19,734
Cash, cash equivalents and restricted cash at end of period 7,371 15,702
Supplemental disclosure of cash flow information:    
Cash received from interest 2
Right-of-use asset and lease liability $ 121