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Note 10 - Related Party Transactions (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 39 Months Ended
Jul. 15, 2021
Mar. 31, 2019
Mar. 31, 2022
Mar. 31, 2022
Dec. 01, 2021
Nov. 30, 2021
Oct. 15, 2021
Sep. 30, 2021
Aug. 31, 2021
Jul. 31, 2020
Apr. 15, 2020
Jan. 01, 2019
Mar. 12, 2018
Mar. 27, 2017
Related Party Transaction, Amounts of Transaction     $ 0 $ 120,000                    
Proceeds from Issuance of Private Placement     $ 2,588,000                      
Private Placement Offering [Member]                            
Stock Issued During Period, Shares, New Issues (in shares)     1,294,000                      
Conversion 2019 Notes To Common Stock [Member]                            
Debt Instrument, Convertible, Conversion Price (in dollars per share)   $ 1.70                        
Conversion AMB Notes To Common Stock [Member]                            
Debt Instrument, Convertible, Conversion Price (in dollars per share)                     $ 1.70      
Conversion of Thomson Note To Common Stock [Member]                            
Debt Instrument, Convertible, Conversion Price (in dollars per share)                   $ 1.70        
Notes 2019 [Member]                            
Proceeds from Issuance of Private Placement   $ 1,750,000                        
Debt Instrument, Interest Rate, Stated Percentage   12.00%                        
Notes 2019 [Member] | Al Bodford [Member]                            
Debt Instrument, Interest Rate, Stated Percentage   12.00%                        
Debt Instrument, Face Amount   $ 175,000                        
Notes 2019 [Member] | AMB Investments LLC [Member]                            
Debt Instrument, Face Amount             $ 400,000              
Non-negotiable AMB Notes [Member] | Al Bodford [Member]                            
Debt Instrument, Interest Rate, Stated Percentage                         8.00% 8.00%
Debt Instrument, Face Amount                         $ 1,000,000 $ 333,333
Term Loan [Member] | Al Bodford [Member]                            
Debt Instrument, Interest Rate, Stated Percentage                     12.00%      
Debt Instrument, Face Amount                     $ 500,000      
Thompson Note [Member] | Greg Thompson [Member]                            
Debt Instrument, Interest Rate, Stated Percentage                   12.00%        
Debt Instrument, Face Amount                   $ 250,000        
Convertible Promissory Notes [Member] | Ten Accredited Investors [Member]                            
Debt Instrument, Interest Rate, Stated Percentage 6.00%                          
Debt Instrument, Convertible, Conversion Price (in dollars per share) $ 2.00                          
Proceeds from Convertible Debt $ 1,488,600                          
Promissory Notes 2021 [Member] | AMB Investments LLC [Member]                            
Debt Instrument, Face Amount                 $ 233,333          
Promissory Notes 2021 [Member] | Warrant Holders [Member]                            
Debt Instrument, Interest Rate, Stated Percentage         12.00% 6.00%                
Debt Instrument, Face Amount                 $ 300,000          
Minimum [Member]                            
Percentage of Pre-merger Capital Stock 5.00% 5.00%           5.00%       5.00%