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Interim Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Operating activities:    
Net loss $ (2,205) $ (1,961)
Adjustments to reconcile net loss to net cash flows from operating activities:    
Depreciation and amortization 17 11
Amortization of discount (premium) on marketable debt security [1]
Share-based compensation expense 343 315
Changes in assets and liabilities:    
Prepaid expenses and other assets (110) (445)
Other payables and accrued liabilities (3,966) (643)
Net cash flows from operating activities (5,921) (2,723)
Investing activities:    
Purchase of property and equipment (68)
Proceeds from sales of marketable security 2,521
Purchase of marketable security (2,496)
Net cash flows from investing activities 2,453 (2,496)
Financing activities:    
Issuance of common stock and warrants, net of issuance costs 9,562
Net cash flows from financing activities 9,562
Increase (decrease) in cash, cash equivalents and restricted cash (3,468) 4,343
Cash, cash equivalents and restricted cash at beginning of period 33,129 5,263
Cash, cash equivalents and restricted cash at ending of period 29,661 9,606
Supplemental disclosure of cash flow information:    
Cash received from interest $ 8
[1] Less than 1