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Note 11 - Notes Payable (Details Textual) - Loan Agreement [Member] - Aqua Metals Reno, Inc [Member] - USD ($) | Feb. 01, 2023 | Sep. 30, 2022
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Summit Investment Services, LLC [Member] |  |
Debt Instrument, Undivided Interest Rate |  | 90.8334%
Debt Instrument, Face Amount | $ 3,000,000 |
Debt Instrument, Interest Rate, Stated Percentage | 9.50% |
Debt Instrument Term, Interest Only Payments (Month) | 24 months |
Debt Instrument, Guaranteed Minimum Interest | $ 213,750 |
Darren McBride, Trustee of the Arduino 1 Trust, U/A Dated April 25, 2022 [Member] |  |
Debt Instrument, Undivided Interest Rate |  | 8.3333%
Jason Yelowitz, Trustee of the Jason Yelowitz 2006 Trust, Dated March 31, 2006 [Member] |  |
Debt Instrument, Undivided Interest Rate |  | 0.8333%
Lenders [Member] |  |
Debt Instrument, Face Amount |  | $ 6,000,000
Debt Instrument, Interest Rate, Stated Percentage |  | 8.50%
Debt Instrument Term, Interest Only Payments (Month) |  | 24 months
Debt Instrument, Guaranteed Minimum Interest |  | $ 255,000

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