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Interim Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Operating activities:    
Net loss $ (7,454) $ (6,532)
Adjustments to reconcile net loss to net cash flows from operating activities:    
Depreciation and amortization 48 53
Non-cash and accrued interest (1)
Share-based compensation expense 1,016 1,468
Changes in assets and liabilities:    
Prepaid expenses and other assets 133 292
Other payables and accrued liabilities (209) (663)
Net cash flows from operating activities (6,467) (5,382)
Investing activities:    
Purchases of property and equipment (25) (83)
Investment in convertible loan (200)
Proceeds from sales of investment 270
Proceeds from sales of marketable security 2,521
Net cash flows from investing activities 245 2,238
Financing activities:    
Repayment of shareholders investment (3,375)
Net cash flows from financing activities (3,375)
Decrease in cash, cash equivalents and restricted cash (6,222) (6,519)
Cash, cash equivalents and restricted cash at beginning of period 19,734 33,129
Cash, cash equivalents and restricted cash at end of period 13,512 26,610
Supplemental disclosure of cash flow information:    
Interest paid from litigation 236
Cash received from interest 3 31
Right-of-use asset and lease liability $ 69