Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Sep. 30, 2025	Dec. 31, 2024
Current assets
Cash and cash equivalents	$ 1,651,548	$ 1,945,523
Accounts receivable	1,970,807	1,521,380
Inventories	1,049,671	820,893
Prepaids and other current assets	305,830	698,030
Total current assets	4,977,856	4,985,826
Long-term assets
Restricted cash	1,477,685	1,431,710
Property, plant and equipment, net	3,413,840	3,297,769
Capitalized lease disposal costs, net	602,404	639,286
Financing lease right-of-use asset	0	826
Operating lease right-of-use asset	2,740,704	2,047,733
Goodwill	1,384,255	1,384,255
Patents and other intangibles, net	3,249,893	3,373,563
Total long-term assets	12,868,781	12,175,142
Total assets	17,846,637	17,160,968
Current liabilities
Accounts payable	1,219,290	861,883
Accrued liabilities	1,629,960	1,494,665
Unearned revenue	484,568	513,317
Current portion of operating lease right-of-use liability	193,001	150,532
Total current liabilities	3,689,427	3,328,796
Long-term liabilities
Accrued long-term liabilities	9,375	37,500
Asset retirement obligation	1,599,724	1,544,788
Operating lease right-of-use liability, net of current portion	2,588,123	1,940,979
Mandatorily redeemable convertible preferred stock	4,063,000	4,063,000
Total long-term liabilities	10,061,375	9,485,164
Total liabilities	13,750,802	12,813,960
Stockholders' equity
Common stock, $0.01 par value; 750,000,000 shares authorized; 528,104,105 and 523,553,435 shares issued and outstanding, respectively	5,281,041	5,235,534
Additional paid in capital	126,613,159	126,432,759
Accumulated deficit	(127,798,365)	(127,321,285)
Total equity	4,095,835	4,347,008
Total liabilities and stockholders' equity	17,846,637	17,160,968
Nonrelated Party [Member]
Current liabilities
Current portion of notes payable	162,608	308,399
Long-term liabilities
Notes payable, net of current portion	181,153	278,897
Related Party [Member]
Long-term liabilities
Notes payable, net of current portion	$ 1,620,000	$ 1,620,000