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STATEMENTS OF CASH FLOWS - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES |  |
Net loss | $ (6,726,967) | $ (5,772,958)
Adjustments to reconcile net loss to net cash used in operating activities |  |
Warrants issued for services | 80,140 | 78,390
Stock options issued for services | 600,727 | 387,688
Common stock issued for services and fees | 407,792 | 172,192
Depreciation and amortization and noncash patent expenses | 698,694 | 465,795
Loss on disposal of property and equipment |  | 10,084
Decrease in assets |  |
Prepaid expenses and other current assets | 165,410 | 247,288
(Decrease) increase in liabilities |  |
Accounts payable | (62,318) | 96,533
Accounts payable and accrued expenses-related parties | 981 | 5,054
Deferred lease liability | 5,082 |
Accrued expenses | 64,614 | (91,031)
Net cash used in operating activities | (4,765,845) | (4,400,965)
CASH FLOWS FROM INVESTING ACTIVITIES |  |
Cost of intangibles | (82,195) | (397,479)
Purchase of property and equipment | (223,475) | (1,037,384)
Sale of property and equipment |  | 2,500
Net cash used in investing activities | (305,670) | (1,432,363)
CASH FLOWS FROM FINANCING ACTIVITIES |  |
Exercise of options and warrants |  | 161,500
Issuance of common stock, institutional investor | 5,638,960 | 4,863,535
Repayment of equipment purchase payable | (505,726) | (499,409)
Net cash provided by financing activities | 5,133,234 | 4,525,626
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS | 61,719 | (1,307,702)
CASH AND CASH EQUIVALENTS - BEGINNING OF YEAR | 2,174,625 | 3,482,327
CASH AND CASH EQUIVALENTS - END OF YEAR | 2,236,344 | 2,174,625
Supplemental Disclosure of Non-cash investing and financing activities: |  |
Operating Lease - Right of Use - Building and Operating lease liability | 885,094 |
Equipment acquisition funded by liability | $ 1,010,000 |

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