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Note 11 - Stockholders' Equity (Details Textual) - USD ($) |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 08, 2022 | Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2023
Preferred Stock, Shares Authorized |  | 5,000,000 |  | 5,000,000 |  |  |
Preferred Stock, Par or Stated Value Per Share |  | $ 1 |  | $ 0.0001 |  |  |
Stock Issued During Period, Value, Acquisitions |  |  | $ 600,004 | $ 600,004 |  |  |
Share-Based Payment Arrangement, Expense |  | $ 71,375 | 109,697 | 387,907 | $ 314,715 |  |
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture |  | $ 12,002 | $ 22,020 | $ 76,043 | $ 25,536 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares) |  | 0 | 0 | 0 | 0 | 0 |
Common Stock [Member] |  |  |  |  |  |  |
Stock Issued During Period, Value, Acquisitions |  |  | $ 27 | $ 27 |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited |  | 19,834 |  | 10,500 | 1,250 |  |
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture |  | 15,388 | 9,382 | 39,636 | 7,828 |  |
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture |  | $ 1 | $ 1 | $ 4 | $ 1 |  |
Common Stock [Member] | Director [Member] |  |  |  |  |  |  |
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture |  | 15,388 | 9,382 | 39,636 | 7,828 |  |
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture |  | $ 12,002 | $ 20,020 | $ 76,043 | $ 25,536 |  |
Restricted Stock [Member] |  |  |  |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited |  | 40,000 | 274,250 | 10,500 | 1,250 |  |
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 | $ 218,552 | $ 71,819 |  |
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 |  |  |  |  |  | $ 2.23
Share-Based Payment Arrangement, Expense |  |  |  | $ 18,787 | $ 10,680 |  |

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