Note 13 - Segment Reporting - Summarized Financial Information (Details) - USD ($)	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Revenue	$ 434,824		$ 35,325		$ 860,775	$ 66,075
Depreciation and amortization	656,717		704,881		1,312,695	1,335,922
Loss from operations	(5,563,182)		(5,931,712)		(10,212,746)	(11,009,161)
Change in fair value of derivative instruments	(77,496)		1,564,617		(833,614)	2,263,212
Total other income (expense), net	(3,089,090)		427,123		(5,357,846)	(177,170)
Net loss	(8,652,272)	$ (6,918,320)	(5,504,589)	$ (5,681,742)	(15,570,592)	(11,186,331)
Capital Expenditures	109,999		28,012		465,938	816,071
Total Assets as of June 30, 2024	104,556,003		106,466,344		104,556,003	106,466,344	$ 106,466,344
Fuels Segment [Member]
Revenue	0		0		0	0
Depreciation and amortization	230,740		435,241		463,322	443,048
Loss from operations	(1,957,619)		(1,570,552)		(2,980,117)	(2,220,152)
Change in fair value of derivative instruments	0		0		0	0
Total other income (expense), net	(69,495)		33,818		(85,378)	34,845
Net loss	(2,027,114)		(1,536,734)		(3,065,495)	(2,185,307)
Capital Expenditures	0		28,012		0	48,531
Total Assets as of June 30, 2024	6,932,502		7,257,580		6,932,502	7,257,580
Metals Segment [Member]
Revenue	7,599		0		7,599	0
Depreciation and amortization	358,427		590,150		714,313	590,150
Loss from operations	(757,276)		(696,288)		(1,475,048)	(718,332)
Change in fair value of derivative instruments	0		0		0	0
Total other income (expense), net	0		0		0	0
Net loss	(757,276)		(696,288)		(1,475,048)	(718,332)
Capital Expenditures	109,999		0		465,938	0
Total Assets as of June 30, 2024	11,297,785		11,797,921		11,297,785	11,797,921
Mining Segment [Member]
Revenue	422,425		27,525		843,576	50,475
Depreciation and amortization	45,158		61,694		90,273	123,388
Loss from operations	(93,489)		(801,487)		(82,455)	(1,356,413)
Change in fair value of derivative instruments	(48,000)		675,000		(333,000)	675,000
Total other income (expense), net	32,169		704,091		(211,303)	747,473
Net loss	(61,320)		(97,396)		(293,759)	(608,940)
Capital Expenditures	0		0		0	6,000
Total Assets as of June 30, 2024	25,405,900		25,003,871		25,405,900	25,003,871
Strategic Investments Segment [Member]
Revenue	0		7,800		0	15,600
Depreciation and amortization	270		35,804		540	69,780
Loss from operations	(22,514)		(1,240,205)		51,068	(2,332,290)
Change in fair value of derivative instruments	(286,215)		2,764,466		(1,273,933)	2,764,466
Total other income (expense), net	(775,913)		2,534,470		(2,329,827)	1,889,702
Net loss	(798,427)		1,294,265		(2,278,759)	(442,588)
Capital Expenditures	0		0		0	761,540
Total Assets as of June 30, 2024	58,771,874		57,082,301		58,771,874	57,082,301
Corporate Segment and Other Operating Segment [Member]
Revenue	4,800		0		9,600	0
Depreciation and amortization	22,122		(418,008)		44,247	109,556
Loss from operations	(2,732,284)		(1,623,180)		(5,726,194)	(4,381,974)
Change in fair value of derivative instruments	256,719		(1,874,849)		773,319	(1,176,254)
Total other income (expense), net	(2,275,851)		(2,845,256)		(2,731,338)	(2,849,190)
Net loss	(5,008,135)		(4,468,436)		(8,457,531)	(7,231,164)
Capital Expenditures	0		0		0	0
Total Assets as of June 30, 2024	$ 2,147,942		$ 5,324,671		$ 2,147,942	$ 5,324,671