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Note 6 - Shareholders' Equity (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended 24 Months Ended
Jul. 15, 2025
May 15, 2025
Mar. 07, 2025
Feb. 22, 2024
Mar. 21, 2023
Mar. 20, 2023
Mar. 21, 2021
Feb. 29, 2024
Feb. 29, 2020
Feb. 28, 2020
Jan. 31, 2020
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2023
Dec. 31, 2026
Dec. 31, 2024
Nov. 10, 2020
Mar. 23, 2018
Dec. 30, 2016
Preferred Stock, Shares Authorized                       20,000,000     20,000,000              
Preferred Stock, Par or Stated Value Per Share                       $ 0.001     $ 0.001              
Stock Issued During Period, Shares, New Issues     62,501 54,559                                    
Deferred Compensation Arrangement with Individual, Fair Value of Shares Issued     $ 193,246 $ 84,576                                    
Share-Based Payment Arrangement, Expense                       $ 112,175 $ 3,266   $ 624,064 $ 44,928            
Share Price   $ 2.99                                        
Treasury Stock, Shares, Acquired               3,996                            
Treasury Stock, Common, Value               $ 3,996       168,836     168,836       $ 168,836      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)       45,360                                    
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)       $ 1.55                                    
Share-Based Payment Arrangement, Employee [Member]                                            
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) 16,232                                          
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share) $ 2.7                                          
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate 0.00%                                          
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 4.05%                                          
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term 5 years 10 months 2 days                                          
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate 93.55%                                          
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value $ 2.08                                          
Non-qualified Stock Option [Member] | Two Thousand Eighteen Stock Option Plan [Member]                                            
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized                                       900,000 450,000  
Share-Based Payment Arrangement, Option [Member]                                            
Share-Based Payment Arrangement, Expense                       $ 35,030 $ 3,266   164,086 $ 44,928            
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period       10 years                                    
Share-Based Payment Arrangement, Option [Member] | Share-Based Payment Arrangement, Employee [Member]                                            
Share-Based Payment Arrangement, Expense                             $ 33,763              
Share-Based Payment Arrangement, Option [Member] | Minimum [Member]                                            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period       0 years                                    
Share-Based Payment Arrangement, Option [Member] | Maximum [Member]                                            
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period       3 years                                    
CEO/CFO [Member]                                            
Deferred Compensation Arrangement with Individual, Fair Value of Shares Issued             $ 437,500                              
Stock Issued During Period, Shares, Issued for Services         46,961                                  
Stock Issued During Period, Value, Issued for Services           $ 82,180                                
Deferred Compensation Arrangement with Individual, Shares Issued   250,000         250,000                              
Share-Based Payment Arrangement, Expense             $ 218,750             $ 273,438     $ 218,750          
Deferred Compensation Arrangement with Individual, Shares Issued (in shares)         125,000                                  
Deferred Compensation Arrangement with Individual, Shares Subject to Repurchase (in shares)                       125,000     125,000   125,000          
Chief Operating Officer [Member]                                            
Deferred Compensation Arrangement with Individual, Fair Value of Shares Issued         $ 25,000                                  
Deferred Compensation Arrangement with Individual, Shares Issued         13,889                                  
Share-Based Payment Arrangement, Expense         $ 25,000                   $ 86,250              
Chief Executive Officer [Member]                                            
Share-Based Payment Arrangement, Expense   $ 747,500                                        
Chief Financial Officer [Member]                                            
Deferred Compensation Arrangement with Individual, Shares Issued   125,000                                        
Share-Based Payment Arrangement, Expense   $ 373,750                                        
Chief Financial Officer [Member] | Forecast [Member]                                            
Share-Based Payment Arrangement, Expense                                   $ 373,750        
Three Board Members [Member]                                            
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)   55,000                                        
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)   $ 2.99                                        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value   $ 2.3                                        
Three Board Members [Member] | Share-Based Payment Arrangement, Option [Member]                                            
Share-Based Payment Arrangement, Expense                       $ 126,500                    
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate   0.00%                                        
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate   4.07%                                        
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term   5 years 10 months 2 days                                        
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate   93.04%                                        
ShipTime Acquisition [Member]                                            
Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares (in shares)                             5,918              
Conversion of Series A Preferred Stock to Common Stock [Member]                                            
Conversion of Stock, Shares Converted (in shares)                   1,015,851                        
Conversion of Stock, Shares Issued (in shares)                 1,015,851                          
Additional Conversion of Series A Preferred Stock to Common Stock [Member]                                            
Conversion of Stock, Shares Issued (in shares)                 2,089,298                          
Series A Preferred Stock [Member]                                            
Preferred Stock, Shares Authorized                       5,000,000     5,000,000       5,000,000     5,000,000
Preferred Stock, Par or Stated Value Per Share                       $ 0.001     $ 0.001       $ 0.001      
Preferred Stock, Coupon Payment Obligation, Percentage of Liquidation Value Per Share                             1.50%              
Preferred Stock, Liquidation Preference Per Share                       $ 3.03     $ 3.03              
Preferred Stock, Shares Outstanding                       0     0       0      
ShipTime Canada Stock [Member]                                            
Conversion of Stock, Shares, Convertible (in shares)                 1                          
PAID Preferred Stock [Member]                                            
Conversion of Stock, Shares Issuable (in shares)                     45                      
PAID Common Stock [Member]                                            
Conversion of Stock, Shares Issuable (in shares)                 356   311                      
Common Stock, Capital Shares Reserved for Future Issuance (in shares)                       2,106,880     2,106,880