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v3.20.1

Consolidated Statements of Cash Flows - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Cash flows from operating activities |  |  |
Net loss | $ (4,450,994) | $ (8,910,002) | $ (5,136,434)
Adjustments to reconcile net loss to net cash used in operating activities: |  |  |
Stock-based compensation to employees | 69,176 | 247,134 | 479,233
Stock-based compensation to non-employees | 179,112 | 944,887 |
Depreciation and amortization | 778,117 | 827,630 | 1,328,403
Loss from disposal of inventories | 6,218 | 58,992 |
Change in fair value of warrants liability | (739,616) | (599,865) | 229,749
Loss on disposal of equipment and intangible assets | 18,502 | 232,171 |
(Recovery from) provision for doubtful accounts: |  |  |
- accounts receivable | 10,148 | 5,826 | (46,831)
- other receivables and prepayments | 499 | 16,403 | 32,213
Change in warranty obligation | (7,911) | (10,261) | (130,885)
(Recovery from) provision for inventory obsolescence | 2,363 |  | (73,860)
Impairment loss for intangible assets |  | 3,281,779 |
Unrealized loss on marketable securities | 1,356,565 |  |
Changes in assets and liabilities: |  |  |
Decrease (increase) in accounts receivable | 20,222 | (88,270) | 115,239
Decrease (increase) in advances to suppliers |  |  |
- third parties | 145,024 | 233,490 | (341,776)
- related party |  |  | 194,311
Decrease(increase) in other receivables and prepayments | 69,773 | 23,352 | (71,117)
Increase in interest receivable - related party | (2,523) | (161,384) |
Decrease(increase) in inventories | 255,592 | (137,464) | (2,007,026)
Decrease(increase) in other taxes receivable | 36,858 | (92,897) | (281,373)
Decrease(increase) in accounts payable | (8,234) | 186,561 | (24,563)
Increase in interest payable- related party | 2,053 | 178,708 |
Decrease in due to related parties - Trade |  |  | (475)
Increase (decrease) in advances from customers | 34,799 | (80,602) | 206,646
Increase (decrease) in accrued expenses and other current liabilities | 553,354 | 214,245 | 119,549
Net cash used in operating activities | (1,670,903) | (3,629,567) | (5,408,997)
Cash flows from investing activities |  |  |
Proceeds from disposal of equipment | 23,016 | 1,309 |
Capital expenditures and other additions |  | (776,328) | (40,780)
Loan to a related party |  | (6,000,000) | (3,000,000)
Repayment from a related party |  | 549,192 | 3,000,000
Consideration paid to BTL |  |  | (146,032)
Non-marketable equity investments |  |  | (1,500,043)
Net cash provided by(used in) investing activities | 23,016 | (6,225,827) | (1,686,855)
Cash flows from financing activities |  |  |
Loans from related parties | 1,362,681 | 3,682,642 | 1,480,320
Net proceeds from option exercises |  | 17,851 |
Net proceeds from issuance of common stock, net of issuance costs |  |  | 1,492,538
Net cash provided by financing activities | 1,362,681 | 3,700,493 | 2,972,858
Effect of exchange rate fluctuations on cash and cash equivalents | (169,269) | (177,275) | 139,656
Net decrease in cash and cash equivalents | (454,475) | (6,332,176) | (3,983,338)
Cash and cash equivalents at beginning of year | 477,309 | 6,809,485 | 10,792,823
Cash and cash equivalents at end of year | 22,834 | 477,309 | 6,809,485
Cash paid during the year for: |  |  |
Income tax |  |  |
Interest |  | 14,840 | 3,812
Non-cash investing and financing activities: |  |  |
Acquisition of property and equipment and construction in progress by decreasing inventories |  | 947,172 |
Offset short-term borrowings - related party against loans to a related party (including accrued interests) |  | $ 5,381,589 |

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