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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Cash flows from operating activities |  |  |
Net (loss) / income | $ 1,058 | $ (59,602) | $ (9,548)
Adjustments to reconcile net (loss)/income to net cash used in operating activities: |  |  |
Depreciation and amortization | 2,518 | 870 | 769
Loss /(Gain) on disposal of property, plant and equipment | (1) | 36 |
Share-based compensation | 2,060 | 405 | 1,865
Unrealized foreign exchange loss / (gain) | (129) | 339 | 89
Gain from equity method investment | (1,988) | (221) | (208)
Change in fair value of convertible promissory notes | (14,591) | 22,791 |
Bad debt expense / (reversal) | (199) | 533 |
Inventory write-down / (reversal when sold) | (458) | 2,456 | 2,065
Changes in operating assets and liabilities, net of effect of acquisition of Ezbuy: |  |  |
Accounts receivable | (777) | 1,860 | (973)
Inventories | 1,582 | 5,638 | (3,293)
Prepaid expenses and other current assets | 3,416 | 10,298 | (5,985)
Due from related parties | (377) |  |
Long-term rental deposits | 353 | (81) | (12)
Accounts payable | 4,702 | (16,185) | (108)
Amounts due to related parties | (4,767) | 4,953 |
Advance from customers | 3,999 | (2,374) | 1,345
Accrued expenses and other current liabilities | 5,292 | (1,584) | (837)
Operating lease right-of-use assets | (11,976) |  |
Operating lease liabilities | 12,165 |  |
Net cash (used in)/provided by operating activities | 1,882 | (29,868) | (14,831)
Cash flows from investing activities |  |  |
Purchase of property and equipment | (917) | (387) | (556)
Proceeds from disposal of property and equipment | 236 |  |
Cash acquired from acquisition of Ezbuy |  | 3,683 |
Payment for long term investment |  |  | (2,950)
Net cash (used in) / provided by investing activities | (681) | 3,296 | (3,506)
Cash flows from financing activities |  |  |
Proceeds from exercise of share options |  | 13 | 37
Repayment of long-term payable under finance leases | (300) | (24) |
Repurchase of ordinary shares | (251) | (3,354) | (3,101)
Net cash used in financing activities | (551) | (3,365) | (3,064)
Net (decrease) / increase in cash, cash equivalents and restricted cash | 650 | (29,937) | (21,401)
Effect of exchange rate changes on cash and cash equivalents and restricted cash | (7) | (275) | 340
Cash, cash equivalents and restricted cash at beginning of year | 39,802 | 70,014 | 91,075
Cash, cash equivalents and restricted cash at end of year | 40,445 | 39,802 | 70,014
Reconciliation of cash and cash equivalents and restricted cash to the consolidated balance sheets |  |  |
Total cash, cash equivalents, and restricted cash shown in the statement of cash flows | 40,445 | 39,802 | 70,014
Supplemental cash flow information: |  |  |
Income taxes paid | (133) | (55) | $ (81)
Interest expense paid | (66) | (4) |
Noncash investing activities: |  |  |
Issuance of convertible promissory notes as the consideration of acquisition of Ezbuy |  | (29,131) |
Acquisition of property, plant and equipment included in long-term payable | (758) | (1,170) |
Purchase of property and equipment included in accrued expenses and other current liabilities | 758 | $ 1,170 |
Disposal of property and equipment included in prepaid expenses and other current assets | (400) |  |
Operating lease right-of-use assets obtained in exchange for new operating lease liabilities | 10,060 |  |
Disposal of long term investment included in amounts due from related parties | $ 4,223 |  |

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- Definition The net amount paid (received) by the reporting entity through acquisition or sale and maturities of long-term investments which qualify for treatment as an investing activity based on management's intention and intended by management to be liquidated, if necessary, beyond the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the long-term. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 + Details
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- Definition Amount of cash inflow from exercise of option under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116856206&loc=SL79508275-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
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- Definition The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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