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Note 11 - Stockholders' Equity (Details Textual) - USD ($)
 3 Months Ended
Mar. 08, 2022
Mar. 31, 2023
Mar. 31, 2022
Stock Issued During Period, Value, Acquisitions     $ 600,004
Share-Based Payment Arrangement, Expense   $ 71,375 109,697
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture   $ 12,002 $ 22,020
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)   0 0
Common Stock [Member]      
Stock Issued During Period, Value, Acquisitions     $ 27
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited   19,834  
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture   15,388 9,382
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture   $ 1 $ 1
Common Stock [Member] | Director [Member]      
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture   15,388 9,382
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture   $ 12,002 $ 20,020
Restricted Stock [Member]      
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited   40,000 274,250
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value   $ 31,200 $ 589,638
Share-Based Payment Arrangement, Expense   $ 59,056 $ 39,840
Swivel Secure Europe [Member]      
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares 269,060    
Business Combination, Indemnification Assets, Amount as of Acquisition Date $ 89,687    
Stock Issued During Period, Value, Acquisitions $ 600,004    
Business Acquisition, Share Price $ 2.23