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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) | 9 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020
Cash Flows From Operating Activities: |  |
Net loss | $ (936,031) | $ (1,822,269)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities: |  |
Depreciation and intangible asset amortization expense | 54,973 | 90,867
Share-based compensation | 51,055 | 252,757
Common stock issued for other expense | 67,000 |
Provision for doubtful accounts | 20,975 | 13,150
Provision for excess and obsolete inventory | (13,764) | (5,117)
Loss on disposal of assets | 8,042 | 4,124
Amortization of ROU asset | 149,597 | 141,871
Changes in operating assets and liabilities: |  |
Accounts receivable | (19,740) | 27,950
Inventory | (139,481) | 714,709
Prepaid expenses and other | (119,296) | (488,007)
Accounts payable and accrued liabilities | (110,872) | (397,181)
Deferred revenue | (664,663) | 2,044,830
Accrued interest | 3,268 |
Lease deposit | (24,183) |
Operating lease liability, net | (197,085) | (79,521)
Accrued equity compensation | 108,945 | 101,472
Net cash (used in)/provided by operating activities | (1,761,260) | 599,635
Cash Flows From Investing Activities |  |
Purchases of property and equipment | (15,316) | (3,500)
Proceeds from the sale of property equipment | 1,500 |
Net cash used in investing activities | (13,816) | (3,500)
Cash Flows From Financing Activities |  |
Cash proceeds from sale of preferred stock and warrants, net of issuance costs | 1,259,874 |
Proceeds from issuance of note payable | 514,200 | 554,000
Net cash provided by financing activities | 1,774,074 | 554,000
Net change in cash and cash equivalents | (1,002) | 1,150,135
Cash and cash equivalents, beginning of period | 2,284,881 | 922,177
Cash and cash equivalents, end of period | 2,283,879 | 2,072,312
Supplemental cash flow information: |  |
Interest paid |  |
Income taxes paid |  |
Non-cash investing and financing activities: |  |
Adjustment of carrying value of series B preferred stock to redemption value | 2,262,847 |
Subscription receivable - series B preferred stock | 1,365,000 |
Options issued for accrued equity compensation | 128,434 |
Accrued dividends | $ 1,447 |

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