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Note 14 - Related Party Transactions (Details Textual)								6 Months Ended
Note 14 - Related Party Transactions (Details Textual)	May 17, 2024 USD ($) $ / shares shares	Dec. 29, 2023 USD ($) shares	Dec. 28, 2023 USD ($)	Dec. 15, 2023 USD ($)	Apr. 26, 2023 USD ($)	Dec. 10, 2021 USD ($)	Sep. 07, 2021 USD ($)	Jun. 30, 2024 USD ($) a shares	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	May 12, 2023 USD ($)	Apr. 21, 2023 USD ($)	Apr. 06, 2023 USD ($)
Investments								$ 50,769,344		$ 50,173,913	$ 365,000	$ 2,000,000	$ 7,000,000
Proceeds from Issuance of Common Stock								$ 5,213,710	$ 2,650,000
Asset Purchase Agreement [Member] \| Flux Photon Corporation (“FPC”) [Member]
Asset Acquisition, Consideration Transferred			$ 16,850,000				$ 17,650,000
Asset Acquisition, Percentage of Future Monthly Consolidated Sales							20.00%
Payments to Acquire Productive Assets			200,000			$ 350,000
Asset Acquisition, Contingent Consideration, Liability			$ 16,650,000			$ 17,650,000
Ownership Percentage			100.00%
FPC Asset Purchase Agreement [Member]
Asset Acquisition, Consideration Transferred			$ 16,850,000				$ 17,650,000
Payments to Acquire Productive Assets			200,000
Asset Acquisition, Consideration Transferred, Liabilities Incurred			$ 16,650,000
Sierra Springs Opportunity Fund, Inc. (SSOF) [Member]
Area of Land (Acre) \| a								2,500
Sierra Springs Opportunity Fund, Inc. (SSOF) [Member] \| S S E [Member]
Subsidiary, Ownership Percentage, Parent								100.00%
Aqua Metals Inc. ("AQMS") [Member]
Payments to Acquire Productive Assets					$ 12,000,000
Dr. Villamagna [Member]
Metal Recycling Furnace Payment				$ 375,000
Metal Recycling Furnace Payment, Percentage of Excess Cash Flow Generated				20.00%
Chief Executive Officer [Member]
Stock Issued During Period, Shares, New Issues (in shares) \| shares	1,250,000
Shares Issued, Price Per Share (in dollars per share) \| $ / shares	$ 0.4
Proceeds from Issuance of Common Stock	$ 500,000
Debt Instrument, Face Amount	$ 1,100,000
Investment Owned, Shares, Assigned to Others (in shares) \| shares	500,000
Chief Executive Officer [Member] \| Minimum [Member]
Debt Instrument, Interest Rate, Stated Percentage	6.00%
Chief Executive Officer [Member] \| Maximum [Member]
Debt Instrument, Interest Rate, Stated Percentage	8.00%
Advances to Sierra Springs Opportunity Fund, Inc. (SSOF) [Member]
Investments								$ 19,575,000
Investment Owned, Balance, Shares (in shares) \| shares								10,875,000
Investment Owned, Percentage of Total Shares Outstanding								17.50%
Advances to Sierra Springs Opportunity Fund, Inc. (SSOF) [Member] \| Chief Executive Officer and Two Directors [Member]
Investments		$ 525,000
Investment Owned, Balance, Shares (in shares) \| shares		8,667,666
Sierra Springs Opportunity Fund, Inc. (SSOF) [Member] \| Chief Executive Officer and Two Directors [Member]
Investment Owned, Percentage of Total Shares Outstanding		13.95%
Sierra Springs Opportunity Fund, Inc. (SSOF) [Member] \| CEO and Two Directors [Member]
Ownership Percentage			100.00%
Conversion of Advances into SSOF Common Stock [Member]
Debt Conversion, Converted Instrument, Shares Issued (in shares) \| shares		3,880,556