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Note 10 - Shareholders' Equity (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Mar. 21, 2023
Mar. 20, 2023
Oct. 14, 2022
Mar. 31, 2021
Mar. 29, 2021
Jan. 31, 2020
Mar. 23, 2018
Oct. 15, 2012
Feb. 01, 2011
Feb. 29, 2020
Feb. 28, 2020
Jun. 30, 2022
Dec. 31, 2021
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Nov. 10, 2020
Dec. 30, 2016
Preferred Stock, Shares Authorized (in shares)                           20,000,000        
Preferred Stock, Par or Stated Value Per Share (in dollars per share)                           $ 0.001        
Stock Issued During Period, Value, Issued for Services                             $ 40,000      
Deferred Compensation Arrangement with Individual, Shares Issued (in shares)                       13,021            
Share-based Payment Arrangement, Expense                           $ 172,488 603,533      
Deferred Compensation Arrangement with Individual, Exercise Price (in dollars per share)                       $ 1.92            
Deferred Compensation Arrangement with Individual, Fair Value of Shares Issued                       $ 25,000            
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)                           $ 0        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)     20,000                     20,000        
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price (in dollars per share)     $ 0.975                     $ 0.98        
Proceeds from Stock Options Exercised     $ 19,500                     $ 19,500 $ 0      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price (in dollars per share)                           $ 3.10        
Two Thousand Eighteen Stock Option Plan [Member]                                    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures, Total (in shares)                             10,000      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Expirations in Period (in shares)                           12,000        
Two Thousand Eighteen Stock Option Plan [Member] | Minimum [Member]                                    
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)                             $ 1.91      
The 2018 Non-qualified Stock Option Plan [Member]                                    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)             2 years                      
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)                           $ 0        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)                           0        
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price (in dollars per share)                           $ 0        
Share-based Compensation Arrangement by Share-based Payment Award, Shares Reserved for Future Issuance (in shares)                         586,000   586,000      
The 2012 Non-qualified Stock Option Plan [Member]                                    
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)                           $ 0        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)                           20,000        
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price (in dollars per share)                           $ 0.98        
Share-based Compensation Arrangement by Share-based Payment Award, Shares Reserved for Future Issuance (in shares)                         0   0      
The 2012 Non-qualified Stock Option Plan [Member] | Maximum [Member]                                    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price (in dollars per share)                 $ 3.30                  
The 2011 Non-qualified Stock Option [Member]                                    
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)                           $ 0        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)                           0        
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price (in dollars per share)                           $ 0        
The 2011 Non-qualified Stock Option [Member] | Minimum [Member]                                    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price (in dollars per share)                 $ 0.98                  
The 2002 Stock Option Plan [Member]                                    
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)                           $ 0        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)                           0        
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price (in dollars per share)                           $ 0        
Share-based Compensation Arrangement by Share-based Payment Award, Shares Reserved for Future Issuance (in shares)                           0        
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 (in shares)             450,000                   900,000  
Share-Based Payment Arrangement, Option [Member]                                    
Share-based Payment Arrangement, Expense                           $ 172,488 $ 603,533      
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total                           $ 57,958        
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)                           1 year        
Share-Based Payment Arrangement, Option [Member] | Two Thousand Eighteen Stock Option Plan [Member]                                    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)                             3 years      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)                             10 years      
Share-Based Payment Arrangement, Option [Member] | The 2018 Non-qualified Stock Option Plan [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)             10 years                      
Share-Based Payment Arrangement, Option [Member] | The 2018 Non-qualified Stock Option Plan [Member] | Share-Based Payment Arrangement, Employee [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage             100.00%                      
Share-Based Payment Arrangement, Option [Member] | The 2012 Non-qualified Stock Option Plan [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)               10 years                    
Share-Based Payment Arrangement, Option [Member] | The 2012 Non-qualified Stock Option Plan [Member] | Share-Based Payment Arrangement, Employee [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage               100.00%                    
Share-Based Payment Arrangement, Option [Member] | The 2011 Non-qualified Stock Option [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)                 10 years                  
Share-Based Payment Arrangement, Option [Member] | The 2011 Non-qualified Stock Option [Member] | Share-Based Payment Arrangement, Employee [Member] | Share-Based Payment Arrangement, Tranche One [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage                 33.33%                  
Share-Based Payment Arrangement, Option [Member] | The 2011 Non-qualified Stock Option [Member] | Share-Based Payment Arrangement, Employee [Member] | Share-Based Payment Arrangement, Tranche Two [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage                 33.33%                  
Share-Based Payment Arrangement, Option [Member] | The 2011 Non-qualified Stock Option [Member] | Share-Based Payment Arrangement, Employee [Member] | Share-Based Payment Arrangement, Tranche Three [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage                 33.33%                  
Share-Based Payment Arrangement, Option [Member] | The 2002 Stock Option Plan [Member]                                    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)                             10 years      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)                         60,000   60,000      
Share-Based Payment Arrangement, Option [Member] | The 2002 Stock Option Plan [Member] | Share-Based Payment Arrangement, Tranche One [Member]                                    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)                             2 years      
Share-Based Payment Arrangement, Option [Member] | The 2002 Stock Option Plan [Member] | Share-Based Payment Arrangement, Tranche Two [Member]                                    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)                             4 years      
Subsequent Event [Member]                                    
Deferred Compensation Arrangement with Individual, Shares Issued (in shares) 46,961                                  
Deferred Compensation Arrangement with Individual, Fair Value of Shares Issued $ 82,180 $ 82,180                                
CEO/CFO [Member]                                    
Stock Issued During Period, Shares, Issued for Services (in shares)         1,050,000                          
Stock Issued During Period, Value, Issued for Services         $ 2,005,500                          
Chief Executive Officer [Member]                                    
Deferred Compensation Arrangement with Individual, Shares Issued (in shares)       250,000                            
Share-based Payment Arrangement, Expense       $ 477,500                            
Two Employees [Member]                                    
Deferred Compensation Arrangement with Individual, Shares Issued (in shares)                         18,099          
Deferred Compensation Arrangement with Individual, Exercise Price (in dollars per share)                         $ 2.21          
Deferred Compensation Arrangement with Individual, Fair Value of Shares Issued                         $ 40,000          
ShipTime Acquisition [Member]                                    
Business Acquisition, Equity Interest Issued or Issuable, 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 (in shares)                         5,000,000 5,000,000 5,000,000      
Preferred Stock, Par or Stated Value Per Share (in dollars per share)                         $ 0.001 $ 0.001 $ 0.001      
Preferred Stock, Shares Issued, Total (in shares)                         0 0 0     5,000,000
Percentages of Payment Obligation                           1.50%        
Preferred Stock, Liquidation Preference Per Share (in dollars per share)                           $ 3.03        
Preferred Stock, Shares Outstanding, Ending Balance (in shares)                         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)           311         356              
Common Stock Exercised Shares (in shares)                               1,461,078    
Common Stock, Capital Shares Reserved for Future Issuance (in shares)                           2,106,808        
PAID Series A Preferred Stock [Member]                                    
Preferred Stock Exercised Shares (in shares)                               1,461,078