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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Cash flows from operating activities:    
Income (loss) for the year $ 2,696 $ 3,516
Adjustments to reconcile income (loss) for the year to net cash used in operating activities:    
Depreciation 47 51
Stock-based compensation 22 356
Issuance of restricted shares as compensation to the board of directors 168 156
Linkage difference on principal of loans from stockholders (8) 7
Changes in assets and liabilities:    
Decrease (increase) in accounts receivable 10 (44)
Decrease (increase) in inventory (85) 1
Increase in other current assets (9) (19)
Decrease in accounts payable (714) (600)
Decrease in other current liabilities (236) (291)
Net cash used in operating activities (3,501) (3,899)
Cash flows from investment activities:    
Purchase of property and equipment (53) (23)
Net cash used in investment activities (53) (23)
Cash flows from financing activities    
Proceeds allocated to Series D Warrants, net of cash issuance expenses 33
Proceeds from issuance of Common Stock, net of cash issuance expenses 13,009 4,165
Net cash provided by financing activities 13,009 4,198
Effect of exchange rate changes on cash and cash equivalents (46) 50
Increase in cash, cash equivalents, and restricted cash 9,409 326
cash, cash equivalents, and restricted cash at beginning of the year 476 150
cash, cash equivalents, and restricted cash at end of the year $ 9,885 $ 476