v3.26.1
Note 8 - Noncontrolling Interest - Clyra Medical (Details Textual)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 72 Months Ended
Dec. 04, 2024
USD ($)
Oct. 31, 2025
USD ($)
$ / shares
shares
Oct. 31, 2023
USD ($)
$ / shares
shares
Jun. 30, 2026
USD ($)
$ / shares
shares
Mar. 31, 2026
USD ($)
$ / shares
shares
Jun. 30, 2025
USD ($)
$ / shares
shares
Mar. 31, 2025
USD ($)
Jun. 30, 2026
USD ($)
$ / shares
shares
Jun. 30, 2025
USD ($)
$ / shares
shares
Dec. 31, 2025
USD ($)
shares
Dec. 31, 2024
USD ($)
Jun. 30, 2026
USD ($)
$ / shares
shares
Warrants and Rights Outstanding [1]       $ 0       $ 0       $ 0
Class of Warrant or Right, Issued During Period (in shares) | shares               1,198,832        
Stock Issued During Period, Value, Issued for Services       $ 236,000 $ 46,000 $ 212,000 $ 61,000          
Share Price (in dollars per share) | $ / shares       $ 0.11       $ 0.11       $ 0.11
Clyra Medical [Member] | Common Stock [Member]                        
Investment Owned, Balance, Shares (in shares) | shares       5,305,156       5,305,156   5,305,156   5,305,156
Clyra Medical [Member] | Preferred Stock, Series A [Member]                        
Investment Owned, Balance, Shares (in shares) | shares       165,765       165,765   165,765   165,765
Measurement Input, Price Volatility [Member]                        
Warrants and Rights Outstanding, Measurement Input                   0    
Maximum [Member] | Measurement Input, Price Volatility [Member]                        
Warrants and Rights Outstanding, Measurement Input       0.66       0.66       0.66
Minimum [Member] | Measurement Input, Price Volatility [Member]                        
Warrants and Rights Outstanding, Measurement Input       0.62       0.62       0.62
Clyra Medical [Member]                        
Shares, Outstanding (in shares) | shares       11,378,545       11,378,545   11,378,545   11,378,545
Shares, Issued (in shares) | shares       11,378,545       11,378,545   11,378,545   11,378,545
Finance Lease, Liability       $ 311,000       $ 311,000       $ 311,000
Clyra Medical [Member] | Sale Leaseback of Equipment [Member]                        
Proceeds from Sale of Property, Plant, and Equipment $ 350,000                      
Financing Receivable, after Allowance for Credit Loss $ 82,000                      
Receivable with Imputed Interest, Effective Yield (Interest Rate) 15.00%                      
Lessee, Finance Lease, Purchase Option, Amount $ 82,000                      
Lessee, Finance Lease, Term of Contract (Year) 49 years                      
Finance Lease, Liability       $ 375,000       375,000       375,000
Clyra Medical [Member] | Vendors [Member]                        
Stock Issued During Period, Shares, Issued for Services (in shares) | shares       2,685 0       9,698      
Stock Issued During Period, Value, Issued for Services       $ 17,000         $ 60,000      
Clyra Medical [Member] | Employees and Consultants [Member] | Share-Based Payment Arrangement, Option [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value               449,000 $ 92,000      
Share Price (in dollars per share) | $ / shares         $ 4.5              
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Discount Rate         30.00%              
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount       $ 1,278,000       $ 1,278,000       $ 1,278,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)               2 years        
Clyra Medical [Member] | Series A Preferred Stock [Member]                        
Shares, Outstanding (in shares) | shares       746,418       746,418   746,418   746,418
Shares Issued, Price Per Share (in dollars per share) | $ / shares     $ 3.1                  
Preferred Stock, Dividend Rate, Percentage     15.00%                  
Preferred Stock, Convertible, Sale of Stock Amount     $ 5,000,000                  
Preferred Stock Dividends and Other Adjustments               $ 1,109,000   $ 937,000    
Clyra Medical [Member] | Series B Preferred Stock [Member]                        
Shares, Outstanding (in shares) | shares       330,000       330,000   330,000   330,000
Clyra Medical [Member] | Preferred Class A [Member]                        
Stock Issued During Period, Shares, New Issues (in shares) | shares     746,418                  
Proceeds from Issuance of Preferred Stock and Preference Stock     $ 1,800,000                  
Clyra Medical [Member] | Revolving Credit Facility [Member] | Vernal Bay Capital Group, LLC [Member] | Inventory Line of Credit [Member]                        
Line of Credit Facility, Maximum Borrowing Capacity       $ 1,000,000       $ 1,000,000       $ 1,000,000
Proceeds from Lines of Credit, Total                       $ 260,000
Long-Term Line of Credit                   $ 134,000    
Clyra Medical [Member] | Warrants Issued Concurrently with Note Payable [Member]                        
Debt Instrument, Interest Rate, Stated Percentage           15.00%     15.00%      
Debt Instrument, Face Amount           $ 575,000     $ 575,000      
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares       $ 6       $ 6       $ 6
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) | shares       72,667       72,667       72,667
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares           $ 6.5     $ 6.5      
Clyra Medical [Member] | Warrant In Connection With Convertible Note [Member]                        
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) | shares       226,344       226,344       226,344
Warrants and Rights Outstanding       $ 353,000       $ 353,000       $ 353,000
Warrants and Rights Outstanding, Measurement Input       6       6       6
Clyra Medical [Member] | Warrant In Connection With Convertible Note [Member] | Maximum [Member]                        
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares       $ 7.5       $ 7.5       $ 7.5
Clyra Medical [Member] | Warrant in Connection with Guaranteed Note [Member]                        
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) | shares           88,462     88,462      
Warrants and Rights Outstanding           $ 80,000     $ 80,000      
Long-Term Debt, Gross       $ 3,970,000       $ 3,970,000   575,000   $ 3,970,000
Clyra Medical [Member] | Warrants Issued With Secured Promissory Notes and Convertible Promissory Notes [Member]                        
Class of Warrant or Right, Discount Percentage       30.00%       30.00%       30.00%
Clyra Medical [Member] | Warrants Issued in Conjunction With the Sale of Series A Preferred Stock [Member]                        
Warrants and Rights Outstanding     $ 524,000                  
Warrants and Rights Outstanding, Term (Month)     3 years                  
Shares Issued, Price Per Share (in dollars per share) | $ / shares     $ 3.72                  
Clyra Medical [Member] | Vendor Warrants [Member]                        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares           $ 6     $ 6      
Warrants and Rights Outstanding           $ 6,000     $ 6,000      
Warrants and Rights Outstanding, Term (Month)           5 years     5 years      
Class of Warrant or Right, Issued During Period (in shares) | shares                 7,849      
Clyra Medical [Member] | Notes Payable, Other Payables [Member]                        
Proceeds from Issuance of Debt                     $ 1,064,000  
Debt Instrument, Interest Rate, Stated Percentage       15.00%       15.00%     15.00% 15.00%
Debt Instrument, Face Amount       $ 3,395,000       $ 3,395,000   $ 436,000   $ 3,395,000
Warrants and Rights Outstanding       99,000       99,000       99,000
Long-Term Debt, Gross       1,500,000       1,500,000       1,500,000
Clyra Medical [Member] | Notes Payable, Other Payables [Member] | Biolargo [Member]                        
Payments to Acquire Notes Receivable                     $ 200,000  
Long-Term Debt, Gross       $ 200,000       $ 200,000       $ 200,000
Clyra Medical [Member] | Convertible Debt [Member]                        
Debt Instrument, Interest Rate, Stated Percentage       15.00%       15.00%       15.00%
Clyra Medical Technologies [Member]                        
Stock Issued During Period, Shares, New Issues (in shares) | shares               0 49,167      
Proceeds from Issuance or Sale of Equity                 $ 295,000      
Clyra Medical Technologies [Member] | Series B Preferred Stock [Member]                        
Stock Issued During Period, Shares, New Issues (in shares) | shares   330,000                    
Proceeds from Issuance of Preferred Stock and Preference Stock   $ 2,145,000                    
Clyra Medical Technologies [Member] | Warrants Issued With Secured Promissory Notes and Convertible Promissory Notes [Member] | Maximum [Member] | Valuation Technique, Black-Scholes-Merton Model [Member] | Measurement Input, Price Volatility [Member]                        
Warrants and Rights Outstanding, Measurement Input       52       52       52
Clyra Medical Technologies [Member] | Warrants Issued With Secured Promissory Notes and Convertible Promissory Notes [Member] | Minimum [Member] | Valuation Technique, Black-Scholes-Merton Model [Member] | Measurement Input, Price Volatility [Member]                        
Warrants and Rights Outstanding, Measurement Input       35       35       35
Clyra Medical Technologies [Member] | Warrants Issued in October 2025 Offering [Member]                        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares   $ 7.5                    
Warrants and Rights Outstanding   $ 94,000                    
Warrants and Rights Outstanding, Term (Month)   3 years                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares   165,000                    
Clyra Medical Technologies [Member] | March 31, 2025 Warrants [Member]                        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares           $ 7.5     $ 7.5      
Warrants and Rights Outstanding           $ 38,000     $ 38,000      
Class of Warrant or Right, Issued During Period (in shares) | shares                 24,584      
Number of Accredited Investors           5     5      
[1] Aggregate intrinsic value based on closing common stock price of $0.16 at March 31, 2026.