Quarterly report [Sections 13 or 15(d)]

Note 10 - Notes Payable (Details Textual)

v3.25.1
Note 10 - Notes Payable (Details Textual)
3 Months Ended
May 02, 2025
USD ($)
Dec. 18, 2024
USD ($)
$ / shares
shares
Feb. 01, 2023
USD ($)
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Dec. 31, 2024
USD ($)
Dec. 19, 2024
shares
Repayments of Notes Payable       $ 500,000 $ (0)    
Common Stock Purchase Warrants [Member]              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares   750,000         750,000
Warrants and Rights Outstanding, Term (Year)   5 years          
Proceeds from Issuance of Warrants   $ 986,000          
Common Stock Purchase Warrants [Member] | Minimum [Member]              
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares   $ 1.92          
Common Stock Purchase Warrants [Member] | Maximum [Member]              
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares   $ 1.93          
Loan Agreement [Member] | Summit Investment Services, LLC [Member] | Aqua Metals Reno, Inc [Member]              
Debt Instrument, Face Amount     $ 3,000,000 3,000,000      
Debt Instrument, Interest Rate, Stated Percentage     9.50%        
Debt Instrument Term, Interest Only Payments (Year)     24 years        
Debt Instrument, Guaranteed Minimum Interest     $ 213,750        
Secured Promissory Notes [Member]              
Debt Instrument, Face Amount   $ 1,500,000   1,000,000      
Debt Instrument, Interest Rate, Stated Percentage   20.00%          
Number of Accredited Investors   8          
Proceeds from Issuance of Private Placement   $ 1,500,000          
Proceeds from Issuance of Debt   514,000          
Payments Of Issuance Costs   58,000          
Repayments of Notes Payable       500,000      
Long-Term Debt, Gross       1,000,000   $ 1,500,000  
Interest Payable       $ 84,000      
Secured Promissory Notes [Member] | Subsequent Event [Member]              
Repayments of Debt $ 1,000,000            
Interest Paid, Including Capitalized Interest, Operating and Investing Activities $ 300,000            
Secured Promissory Notes [Member] | Certain Officers and Directors [Member]              
Debt Instrument, Face Amount   1,250,000          
Secured Promissory Notes [Member] | Director Appointed in February 2025 [Member]              
Debt Instrument, Face Amount   $ 400,000