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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
Net loss | $ (26,534) | $ (19,635) | $ (25,934)
Adjustments to reconcile net loss to net cash used in operating activities: |  |  |
Depreciation | 1,099 | 1,093 | 1,038
Stock-based compensation | 9,869 | 5,329 | 2,864
Exchange rate differences | (496) | (2,821) | (429)
Interest from short-term deposits | 87 | 524 | 188
Change in fair value of warrant liability |  | 109 |
Change in fair value of Forfeiture Shares | 173 |  |
Equity in earnings of investee, net of dividend received | 18 | 11 | 2
Changes in operating assets and liabilities: |  |  |
Trade accounts receivable | 1,584 | (944) | 2,457
Prepaid expenses | (4,583) | (902) | 304
Other current assets | (703) | 161 | (161)
Inventories | (6,163) | (449) | (1,728)
Long-term assets | (411) | (1) | (119)
Trade accounts payable | 2,633 | (1,470) | (545)
Accrued compensation | 633 | (1,555) | 158
Other current liabilities | 1,184 | 944 | 243
Other long-term liabilities | 1 |  | 45
Net cash used in operating activities | (21,609) | (19,606) | (21,617)
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Investment in short-term deposits | (121,947) | (86,861) | (90,000)
Maturities in short-term deposits | 39,227 | 116,036 | 102,000
Purchase of property and equipment | (1,443) | (861) | (1,431)
Net cash provided by (used in) investing activities | (84,163) | 28,314 | 10,569
CASH FLOWS FROM FINANCING ACTIVITIES - |  |  |
Proceeds from Transactions related to the Merger, net | 134,185 |  |
Exercise of options | 1,246 | 406 | 132
Net cash provided by financing activities | 135,431 | 406 | 132
Effect of exchange rate changes on cash and cash equivalents | 816 | 1,646 | 429
INCREASE IN CASH AND CASH EQUIVALENTS | 30,475 | 10,760 | (10,487)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR | 26,316 | 15,556 | 26,043
CASH AND CASH EQUIVALENTS AT END OF YEAR | 56,791 | 26,316 | 15,556
SUPPLEMENT DISCLOSURE OF CASH FLOW INFORMATION - |  |  |
Cash paid for taxes | 417 | $ 139 | $ 433
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES: |  |  |
Trade accounts payable on account of property and equipment | 44 |  |
Unpaid issuance costs | 41 |  |
Conversion of Redeemable Convertible Preferred Shares | 150,179 |  |
Issuance of Forfeiture Shares | $ 4,485 |  |

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