v3.26.1
Note 8 - Noncontrolling Interest - Clyra Medical (Details Textual)
 1 Months Ended 3 Months Ended 12 Months Ended 69 Months Ended
Dec. 04, 2024
USD ($)
Oct. 31, 2025
USD ($)
$ / shares
shares
Oct. 31, 2023
USD ($)
$ / shares
shares
Mar. 31, 2026
USD ($)
$ / shares
shares
Mar. 31, 2025
USD ($)
$ / shares
shares
Dec. 31, 2025
USD ($)
shares
Dec. 31, 2024
USD ($)
Mar. 31, 2026
USD ($)
$ / shares
shares
Jun. 30, 2020
Warrants and Rights Outstanding [1]       $ 0       $ 0  
Class of Warrant or Right, Issued During Period (in shares) | shares       1,198,832          
Stock Issued During Period, Value, Issued for Services       $ 46,000 $ 61,000        
Share Price (in dollars per share) | $ / shares       $ 0.16       $ 0.16  
Clyra Medical [Member] | Common Stock [Member]                  
Investment Owned, Balance, Shares (in shares) | shares       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  
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  
Minimum [Member] | Measurement Input, Price Volatility [Member]                  
Warrants and Rights Outstanding, Measurement Input       0.62       0.62  
Clyra Medical [Member]                  
Shares, Outstanding (in shares) | shares       11,375,860   11,375,860   11,375,860  
Shares, Issued (in shares) | shares       11,375,860   11,375,860   11,375,860  
Finance Lease, Liability       $ 336,000       $ 336,000  
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       $ 412,000       $ 412,000  
Clyra Medical [Member] | Vendors [Member]                  
Stock Issued During Period, Shares, New Issues (in shares) | shares       0          
Stock Issued During Period, Shares, Issued for Services (in shares) | shares         6,000        
Stock Issued During Period, Value, Issued for Services         $ 36,000        
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       $ 297,000 $ 49,000        
Share Price (in dollars per share) | $ / shares       $ 4.5       $ 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       $ 1,384,000       $ 1,384,000  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)       3 years          
Clyra Medical [Member] | Series A Preferred Stock [Member]                  
Shares, Outstanding (in shares) | shares       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       $ 1,023,000   $ 937,000      
Clyra Medical [Member] | Series B Preferred Stock [Member]                  
Shares, Outstanding (in shares) | shares       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]                  
Debt Instrument, Interest Rate, Stated Percentage                 15.00%
Line of Credit Facility, Maximum Borrowing Capacity       $ 1,000,000       $ 1,000,000  
Proceeds from Lines of Credit, Total               260,000  
Repayments of Lines of Credit               $ 126,000  
Debt Instrument, Percentage of Principal Payment, Cap       15.00%       15.00%  
Long-Term Line of Credit       $ 134,000   $ 134,000   $ 134,000  
Clyra Medical [Member] | Warrants Issued Concurrently with Note Payable [Member]                  
Debt Instrument, Interest Rate, Stated Percentage         15.00%        
Debt Instrument, Face Amount         $ 575,000        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares       $ 6       $ 6  
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) | shares       72,667       72,667  
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares         $ 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       159,668       159,668  
Warrants and Rights Outstanding       $ 232,000       $ 232,000  
Warrants and Rights Outstanding, Measurement Input       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  
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        
Warrants and Rights Outstanding         $ 80,000        
Long-Term Debt, Gross       $ 2,970,000   575,000   $ 2,970,000  
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%  
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        
Warrants and Rights Outstanding         $ 5,000        
Warrants and Rights Outstanding, Term (Month)         5 years        
Class of Warrant or Right, Issued During Period (in shares) | shares         3,000        
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%  
Debt Instrument, Face Amount           436,000      
Warrants and Rights Outstanding       $ 99,000       $ 99,000  
Long-Term Debt, Gross       $ 1,300,000   $ 1,300,000   $ 1,300,000  
Clyra Medical [Member] | Notes Payable, Other Payables [Member] | Biolargo [Member]                  
Payments to Acquire Notes Receivable             $ 200,000    
Clyra Medical [Member] | Convertible Debt [Member]                  
Debt Instrument, Interest Rate, Stated Percentage       15.00%       15.00%  
Debt Instrument, Face Amount       $ 2,395,000       $ 2,395,000  
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       43       43  
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  
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        
Warrants and Rights Outstanding         $ 38,000        
Class of Warrant or Right, Issued During Period (in shares) | shares         24,584        
Number of Accredited Investors         5        
[1] Aggregate intrinsic value based on closing common stock price of $0.16 at March 31, 2026.