v3.25.2
Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)
Jun. 30, 2025
Dec. 31, 2024
Current assets    
Cash and cash equivalents $ 1,859,424 $ 1,945,523
Accounts receivable 1,732,939 1,521,380
Inventories 670,542 820,893
Prepaids and other current assets 311,984 698,030
Total current assets 4,574,889 4,985,826
Long-term assets    
Restricted cash 1,462,280 1,431,710
Property, plant and equipment, net 3,397,022 3,297,769
Capitalized lease disposal costs, net 614,698 639,286
Financing lease right-of-use asset 0 826
Operating lease right-of-use asset 2,785,839 2,047,733
Goodwill 1,384,255 1,384,255
Patents and other intangibles, net 3,291,116 3,373,563
Total long-term assets 12,935,210 12,175,142
Total assets 17,510,099 17,160,968
Current liabilities    
Accounts payable 935,026 861,883
Accrued liabilities 1,254,250 1,494,665
Unearned revenue 568,816 513,317
Current portion of operating lease right-of-use liability 189,780 150,532
Total current liabilities 3,108,257 3,328,796
Long-term liabilities    
Accrued long-term liabilities 18,750 37,500
Asset retirement obligation 1,581,198 1,544,788
Operating lease right-of-use liability, net of current portion 2,637,598 1,940,979
Mandatorily redeemable convertible preferred stock 4,063,000 4,063,000
Total long-term liabilities 10,135,960 9,485,164
Total liabilities 13,244,217 12,813,960
Stockholders' equity    
Common stock, $0.01 par value; 750,000,000 shares authorized; 528,010,308 and 523,553,435 shares issued and outstanding, respectively 5,280,103 5,235,534
Additional paid in capital 126,580,543 126,432,759
Accumulated deficit (127,594,764) (127,321,285)
Total equity 4,265,882 4,347,008
Total liabilities and stockholders' equity 17,510,099 17,160,968
Nonrelated Party [Member]    
Current liabilities    
Current portion of notes payable 160,385 308,399
Long-term liabilities    
Notes payable, net of current portion 215,414 278,897
Related Party [Member]    
Long-term liabilities    
Notes payable, net of current portion $ 1,620,000 $ 1,620,000