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Interim Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Operating activities:    
Net loss $ (3,503) $ (3,376)
Adjustments to reconcile net loss to net cash flows from operating activities:    
Depreciation and amortization 25 23
Share-based compensation expense 610 896
Vacation 28
Amortization of discount (premium) on marketable debt securities (7)
Changes in assets and liabilities:    
Accounts receivable 333 (138)
Other payables and accrued liabilities (686) 52
Net cash flows from operating activities (3,200) (2,543)
Investing activities:    
Purchase of property and equipment (224)
Purchase of marketable debt securities (2,496)
Net cash flows from investing activities (2,496) (224)
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 3,866 (2,767)
Cash, cash equivalents and restricted cash, beginning 5,263 10,814
Cash, cash equivalents and restricted cash, ending 9,129 8,047
Non-cash investing and financing activities:    
Conversion of Series A Convertible Preferred Stock into common stock 30
Recognition of right-of-use asset and lease liability upon adoption of ASU 2016-02 630
Supplemental disclosure of cash flow information:    
Cash received from interest 21
Cash paid for taxes