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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
NET LOSS | $ (2,752) | $ (3,425) | $ (1,293)
Adjustments to reconcile net income (loss) to net cash used in operating activities: |  |  |
Depreciation | 24 | 11 | 3
Amortization | 9 | 9 | 5
Stock-based compensation |  |  | 1
Bad debt expense | 2 | 7 | 5
Gain on disposal of investment in securities |  | (125) |
Changes in the fair value of investment in equity securities recognized at fair value | (409) |  |
Unrealized foreign exchange loss | 1,022 |  |
Other | 3 |  |
Net changes in: |  |  |
Accounts receivable | 64 | 3 | 89
Prepaid expenses | 341 | (313) | 25
Prepaid licensing and royalty fees | (142) | 96 | (87)
Prepaid pension assets | (59) | (16) | 19
Other assets | (141) | (151) | (90)
Accounts payable | (66) | 47 | 5
Accrued expenses | (284) | (80) | 236
Other liabilities | (121) | (198) | (993)
Net cash used in operating activities | (2,509) | (4,135) | (2,075)
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Purchase of investment in securities |  |  | (10,000)
Purchases of property, plant and equipment | (52) | (76) | (24)
Increase in intangible assets | (18) | (17) | (8)
Proceeds from disposal of investment in securities |  | 80 |
Decrease (increase) in refundable deposits |  | (4) | (9)
Net cash used in investing activities | (70) | (17) | (10,041)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Net foreign currency exchange differences on cash, cash equivalents and restricted cash | (75) | (89) | (156)
NET DECREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH | (2,654) | (4,241) | (12,272)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT BEGINNING OF YEAR | 41,761 | 46,002 | 58,274
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT END OF YEAR | $ 39,107 | 41,761 | $ 46,002
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION: |  |  |
Income tax refund during the year |  | $ (2) |

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