Note 11 - Stockholders' Equity (Details Textual) - USD ($)					3 Months Ended				6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Mar. 08, 2022	Jun. 18, 2021	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Share-Based Payment Arrangement, Expense					$ 77,396		$ 83,699		$ 148,771	$ 193,396
Stock Issued During Period, Value, Acquisitions								$ 600,004
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture					$ 16,002	$ 12,002	$ 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)						40,000	1,250	274,250
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited (in shares)					14,375	19,834	1,250
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture (in shares)					23,150	15,388	9,117	9,382
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture					$ 2	$ 1	$ 1	$ 1
Common Stock [Member] | Director [Member]
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture (in shares)					23,150		9,117		38,538	18,499
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture					$ 16,002		$ 18,006		$ 28,004	$ 40,026
Restricted Stock [Member]
Share-Based Payment Arrangement, Expense					$ 54,781		$ 51,204		$ 113,837	$ 91,044
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures (in shares)									40,000	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									$ 31,200	$ 592,075
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited (in shares)					34,209					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