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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) | 6 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
Cash Flows From Operating Activities: |  |
Net income (loss) | $ 16,339,371 | $ (2,832,004)
Adjustments to reconcile net income (loss) to net cash flows used in operating activities: |  |
Depreciation and amortization | 145,459 | 134,143
Stock-based compensation | 656,378 | 688,415
Change in fair value of warrant derivative liabilities | (21,688,835) |
Provision for inventory obsolescence | 361,437 | 238,957
Gain on extinguishment of debt | (10,000) |
Amortization of discount on unsecured promissory notes |  | 86,867
Change in fair value of secured convertible notes |  | 1,300,252
Change in fair value of proceeds investment agreement |  | (2,885,000)
Debt issuance costs |  | 34,906
(Increase) decrease in: |  |
Accounts receivable – trade | 817,077 | (9,866)
Accounts receivable – other | (265,627) | (23,620)
Inventories | (1,774,922) | 289,170
Prepaid expenses | (391,084) | (193,366)
Operating lease right of use assets | 30,332 | (647,176)
Other assets | (616,005) | 79,981
Increase (decrease) in: |  |
Accounts payable | (307,744) | (804,120)
Accrued expenses | 79,290 | 92,811
Income taxes payable | (7,231) | (4,776)
Operating lease obligations | (41,185) | 572,022
Contract liabilities | 523,516 | (174,599)
Net cash used in operating activities | (6,149,773) | (4,057,003)
Cash Flows from Investing Activities: |  |
Purchases of property, plant and equipment | (5,452,729) | (96,011)
Additions to intangible assets | (41,126) | (67,098)
Cash paid for business acquisition, net of cash acquired | (1,012,552) |
Net cash used in investing activities | (6,506,407) | (163,109)
Cash Flows from Financing Activities: |  |
Proceeds from unsecured promissory note payable, related party |  | 319,000
Proceeds from unsecured promissory note payable |  | 100,000
Proceeds from promissory notes payable |  | 1,568,900
Proceeds from issuance of common stock upon exercise of warrants |  | 5,203,122
Proceeds from issuance of secured convertible notes payable |  | 1,500,000
Proceeds from sale of common stock in underwritten public offering |  | 12,829,241
Proceeds from exercise of stock options |  | 7,800
Principal payment on subordinated notes payable |  | (400,000)
Principal payment on secured convertible notes |  | (748,180)
Principal payments on unsecured promissory note payable, related party |  | (319,000)
Debt issuance costs |  | (34,906)
Net proceeds from sale of common stock in registered direct offerings | 13,346,600 |
Proceeds from issuance of common stock upon exercise of pre-funded warrants | 53,224,000 |
Principal payment on subordinated notes payable |  |
Principal payment on secured convertible notes |  |
Net cash provided by financing activities | 66,570,600 | 20,025,977
Net increase in cash and cash equivalents | 53,914,420 | 15,805,865
Cash, cash equivalents, beginning of period | 4,361,758 | 359,685
Cash, cash equivalents, end of period | 58,276,178 | 16,165,550
Supplemental disclosures of cash flow information: |  |
Cash payments for interest |  | 128,911
Cash payments for income taxes | 7,231 | 4,776
Supplemental disclosures of non-cash investing and financing activities: |  |
Issuance of contingent consideration promissory note for business acquisition | 350,000 |
Liabilities assumed in business acquisition | 162,552 |
Restricted common stock grant | 450 | 664
Restricted common stock forfeitures | 8 | 36
Cashless exercise of common stock purchase warrants | 0 | 7
Amounts allocated to initial measurement of warrant derivative liabilities in connection to the warrants and pre-funded warrants | 51,216,058 |
Issuance of common stock upon conversion of secured convertible notes |  | 3,024,685
Amounts allocated to common stock purchase warrants in connection with issuance of unsecured promissory note payable |  | $ 741,947

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