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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 | $ (5,002) | $ (5,828) | $ (23,676)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities: |  |  |
Depreciation | 206 | 372 | 572
Lease amortization | 994 | 1,429 | 1,516
Net gain on disposal of assets | (2) | (33) |
Gain on liquidation of a subsidiary |  | (6) |
Reversal of guarantee obligations (ASC 460) reserve upon expiration of statute of limitations | (21) | (42) |
Investment impairment |  |  | 1,029
Stock-based compensation expense | 603 | 504 | 703
Allowance for (recovery of) credit losses | (3,465) | (9,158) | 9,441
Allowance for inventory | 682 | 4,573 | 170
Deferred income taxes | 1,135 | 2,052 | (1,499)
Changes in operating assets and liabilities |  |  |
Accounts receivable | 19,043 | 31,336 | 18,767
Inventories and deferred costs | (448) | 578 | (230)
Prepaid and other assets | 1,693 | (4,595) | 600
Accounts payable | (6,057) | (6,089) | (5,754)
Income taxes payable | (417) | 2,832 | (1,894)
Customer advances | (108) | (160) | 231
Deferred revenue | (6) | (329) | (1,254)
Other liabilities | (1,553) | 2,393 | (2,122)
Net cash provided by (used in) operating activities | 7,277 | 19,829 | (3,400)
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Purchase of property, plant and equipment | (250) | (348) | (115)
Proceeds from sale of short-term investments |  | 2,100 | 2,095
Net cash provided by (used in) investing activities | (250) | 1,752 | 1,980
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from exercise of stock options | 20 |  |
Repurchase of ordinary shares | (13) |  | (374)
Net cash provided by (used in) financing activities | 7 |  | (374)
Effect of exchange rate changes on cash and cash equivalents | (6,451) | (3,693) | 1,575
Net Increase (decrease) in cash and cash equivalents | 583 | 17,888 | (219)
Cash, cash equivalents and restricted cash at beginning of year | 66,276 | 48,388 | 48,607
Cash, cash equivalents and restricted cash at end of year | 66,859 | 66,276 | 48,388
Cash paid: |  |  |
Interest paid |  |  | 10
Income taxes paid | $ 1,342 | $ 800 | $ 2,100

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