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v3.10.0.1

Consolidated Statements of Cash Flows - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Operating activities |  |  |
Net loss | $ (10,382,059) | $ (9,258,647) | $ (8,470,661)
Adjustment to reconcile net loss to net cash used in operating activities |  |  |
Depreciation and amortization | 843,387 | 184,946 | 153,996
Share-based compensation | 263,396 | 122,134 | 218,294
Gain on disposal of equipment | (13,233) | (941) | (2,861)
Non-cash interest expense | (1,364) | 0 | 395,833
Changes in operating assets and liabilities: |  |  |
Other receivables | 56,212 | (11,440) | (121,640)
Inventory | 93,956 | (169,991) | 0
Prepaid expenses and other assets | 289,868 | (592,602) | 38,054
Accounts payable and accrued liabilities | (966,928) | 625,763 | 340,092
Net cash used in operating activities | (9,816,765) | (9,100,778) | (7,448,893)
Investing activities |  |  |
Purchase of property, plant and equipment | (4,009,736) | (18,893,264) | (934,495)
Deposits on equipment purchases | (95,001) | (153,663) | (156,982)
Proceeds from sale of equipment | 23,233 | 941 | 23,844
Payment of patent costs | 0 | 0 | (5,664)
Net cash used in investing activities | (4,081,504) | (19,045,986) | (1,073,297)
Financing activities |  |  |
Proceeds from issuance of debt | 771,858 | 256,807 | 547,142
Repayment of term debt | (55,615) | (35,812) | (6,268)
Proceeds from the issuance of convertible debt | 0 | 0 | 10,000,000
Proceeds from the issuance of common stock and warrants, net | 10,616,046 | 24,989,257 | 0
Proceeds from exercise of stock options and warrants, net | 5,116,533 | 27,502 | 0
Net cash provided by financing activities | 16,448,822 | 25,237,754 | 10,540,874
Effect of exchange rate changes on cash and cash equivalents | (53,218) | 77,262 | (7,496)
Net change in cash and cash equivalents | 2,497,335 | (2,831,748) | 2,011,188
Cash and cash equivalents at beginning of period | 492,861 | 3,324,609 | 1,313,421
Cash and cash equivalents at the end of period | 2,990,196 | 492,861 | 3,324,609
Supplemental disclosure of cash flow information and non-cash transactions: |  |  |
Interest paid in cash | 22,257 | 21,537 | 6,721
Conversion of convertible debt and accrued interest to common stock | 0 | 0 | 10,395,833
Property and equipment included in accounts payable and accrued liabilities | 193,378 | 1,036,240 | 50,132
Acquisition of equipment under debt agreement | $ 74,068 | $ 0 | $ 0

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