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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) |  |
Net loss | $ (1,730,404) | $ (6,348,287)
Depreciation and amortization | 1,085,747 | 959,445
Accretion of asset retirement obligation | 73,081 | 13,471
Changes in asset retirement obligation estimates | 0 | 324,984
Noncash operating lease expense | 222,188 | 0
Share-based compensation | 568,588 | 0
Loss on sale or disposal of property, plant and equipment, net | 11,097 | 217,921
Write-down of inventory to net realizable value | 65,647 | 2,073,404
Change in allowance for doubtful accounts on accounts receivable | 261,047 | (239,772)
Change in IVA receivable and other assets, net | 100,718 | 388,442
Other noncash items | (16,107) | (7,500)
Changes in operating assets and liabilities: |  |
Accounts receivable | (270,261) | (80,571)
Inventories | 74,738 | (2,084,445)
Prepaid expenses and other current assets | (11,792) | 45,230
Accounts payable | 1,088,773 | (171,868)
Accrued liabilities | 1,293,305 | (67,308)
Accrued liabilities - directors | 16,477 | 51,847
Stock payable to directors | (38,542) | (22,917)
Change in operating lease liability | (31,908) | 0
Royalties payable | (19,995) | (281,646)
Net cash provided (used) by operating activities | 2,220,303 | (4,750,026)
Proceeds from redemption of certificates of deposit | 72,898 | 186,959
Proceeds from sale of properties, plants and equipment | 315,625 | 0
Purchases of properties, plant, and equipment | (430,596) | (1,528,672)
Net cash used by investing activities | (42,073) | (1,341,713)
Payments on dividends payable | 0 | (787,730)
Principal payments on long-term debt | (103,488) | (283,562)
Proceeds from issuance of common stock, net of issuance costs | 2,759,681 | 0
Proceeds from exercise of warrants | 1,481,840 | 0
Net cash provided (used) by financing activities | 4,138,033 | (1,071,292)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH | 6,316,263 | (7,163,031)
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AT BEGINNING OF PERIOD | 11,954,635 | 19,117,666
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD | 18,270,898 | 11,954,635
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION |  |
Interest paid in cash | 8,869 | 10,521
NON-CASH FINANCING AND INVESTING ACTIVITIES: |  |
Equipment purchased with note payable | 402,722 | 0
Recognition of operating lease liability and right of use asset | 787,477 | 0
Common stock buyback and retirement | 0 | 202,980
Conversion of Preferred Series D to Common Stock | $ 0 | $ 16,926

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