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Note 11 - Stockholders' Equity (Details Textual) - USD ($) |  |  | 3 Months Ended | 8 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | ---
Mar. 08, 2022 | Jun. 18, 2021 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Share-Based Payment Arrangement, Expense |  |  | $ 71,820 |  |  | $ 83,699 |  |  |  |  | $ 220,591 | $ 193,396
Stock Issued During Period, Value, Acquisitions |  |  |  |  |  |  |  | $ 600,004 |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures (in shares) |  |  |  |  |  |  |  |  |  |  | 295,275 |
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture |  |  | $ 11,002 | $ 16,002 | $ 12,002 | $ 18,009 | $ 18,006 | 22,020 |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares) |  |  | 0 |  |  | 0 |  |  |  |  | 0 | 0
Class of Warrant or Right, Issued During Period (in shares) |  |  | 0 |  |  | 0 |  |  |  |  | 0 | 0
Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares) |  |  |  | 28,020 |  |  | 26,006 |  |  |  |  |
Stock Issued During Period, Value, Acquisitions |  |  |  |  |  |  |  | $ 27 |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures (in shares) |  |  | 255,275 |  | 40,000 | 2,500 | 1,250 | 274,250 |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited (in shares) |  |  | 33,333 | 14,375 | 19,834 |  | 1,250 |  |  |  |  |
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture (in shares) |  |  | 16,874 | 23,150 | 15,388 | 8,547 | 9,117 | 9,382 |  |  |  |
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture |  |  | $ 2 | $ 2 | $ 1 | $ 1 | $ 1 | $ 1 |  |  |  |
Common Stock [Member] | Director [Member] |  |  |  |  |  |  |  |  |  |  |  |
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture (in shares) |  |  | 16,874 |  |  | 554,128 |  |  |  |  | 8,547 | 27,046
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture |  |  | $ 11,002 |  |  | $ 39,006 |  |  |  |  | $ 18,009 | $ 58,035
Restricted Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Payment Arrangement, Expense |  |  | $ 50,422 |  |  | $ 65,836 |  |  |  |  | $ 164,259 | $ 156,880
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures (in shares) |  |  |  |  |  |  |  |  |  |  |  | 275,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) |  |  |  |  |  |  |  |  |  |  | 3 years |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value |  |  |  |  |  |  |  |  |  |  | $ 170,974 | $ 592,075
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited (in shares) |  |  |  |  |  |  |  |  |  |  | 67,542 | 1,250
Swivel Secure Europe [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in 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 (in dollars per share) | $ 2.23 |  |  |  |  |  |  |  |  |  |  |
Employee Stock Purchase Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Capital Shares Reserved for Future Issuance (in shares) |  | 789,000 |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent |  | 85.00% |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares) |  |  |  |  |  |  |  |  | 28,020 | 26,006 |  |
Share-Based Payment Arrangement, Expense |  |  |  |  |  |  |  |  | $ 3,563 | $ 8,314 |  |

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