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Note 15 - Stockholders' Equity (Details Textual) - USD ($) |  |  | 3 Months Ended | 6 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | ---
Mar. 08, 2022 | Jun. 18, 2021 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Preferred Stock, Shares Authorized (in shares) |  |  | 5,000,000 |  |  |  |  |  |  | 5,000,000 |
Preferred Stock, Par or Stated Value Per Share (in dollars per share) |  |  | $ 1 |  |  |  |  |  |  | $ 1 |
Stock Issued During Period, Value, Acquisitions |  |  |  |  | $ 600,004 |  |  |  |  |  |
Share-based Payment Arrangement, Expense |  |  | $ 100,746 |  |  | $ 58,050 |  |  |  | $ 294,143 | $ 240,321
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture, Total |  |  | $ 18,009 | $ 18,006 | 22,020 | $ 6,008 | $ 5,505 | $ 7,510 |  |  |
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, Value, Acquisitions |  |  |  |  | $ 27 |  |  |  |  |  |
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares) |  |  |  | 26,006 |  |  |  |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total (in shares) |  |  | 2,500 | 1,250 | 274,250 | 3,750 | 1,250 | 1,250 |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited (in shares) |  |  |  | 1,250 |  |  | 1,250 |  |  |  |
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture, Total (in shares) |  |  | 8,547 | 9,117 | 9,382 | 1,888 | 1,748 | 2,091 |  |  |
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture, Total |  |  | $ 1 | $ 1 | $ 1 | $ 0 | $ 0 | $ 0 |  |  |
Common Stock [Member] | Director [Member] |  |  |  |  |  |  |  |  |  |  |
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture, Total (in shares) |  |  | 8,547 |  |  | 1,888 |  |  |  | 27,046 | 5,727
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture, Total |  |  | $ 18,008 |  |  | $ 6,008 |  |  |  | $ 58,034 | $ 19,023
Restricted Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Payment Arrangement, Expense |  |  | $ 65,836 |  |  | $ 18,360 |  |  |  | $ 156,880 | $ 52,081
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total (in shares) |  |  |  |  |  |  |  |  |  | 278,000 | 6,250
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 |  |  |  |  |  |  |  |  |  | $ 597,500 | $ 18,456
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited (in shares) |  |  |  |  |  |  |  |  |  | 1,250 | 1,250
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) |  |  |  |  |  |  |  |  | 19,484 | 26,006 |
Share-based Payment Arrangement, Expense |  |  |  |  |  |  |  |  | $ 10,680 | $ 8,314 |
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 |  |  |  |  |  |  |  |  |  |

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