Note 6 - Shareholders' Equity (Details Textual) - USD ($)						1 Months Ended		3 Months Ended			6 Months Ended		12 Months Ended
	May 12, 2023	Mar. 21, 2023	Mar. 20, 2023	Mar. 21, 2021	Jan. 31, 2020	Feb. 29, 2020	Feb. 28, 2020	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2020	Dec. 31, 2022	Nov. 10, 2020	Mar. 23, 2018	Dec. 30, 2016
Preferred Stock, Shares Authorized (in shares)									20,000,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share)									$ 0.001
Common Stock Shares Exchanged (in shares)													178,000
Stock Issued During Period, Value, Issued for Services										$ 25,000
Deferred Compensation Arrangement with Individual, Shares Issued (in shares)										13,021
Share-Based Payment Arrangement, Expense								$ 94,238		$ 41,916	$ 486,776	$ 60,012
Deferred Compensation Arrangement with Individual, Fair Value of Shares Issued										$ 25,000
Deferred Compensation Arrangement with Individual, Exercise Price (in dollars per share)										$ 1.92
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)	3,500
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price (in dollars per share)	$ 0.975
Proceeds from Stock Options Exercised	$ 3,412										3,412	0
Non-qualified Stock Option [Member] | Two Thousand Eighteen Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)															900,000	450,000
Share-Based Payment Arrangement, Option [Member]
Share-Based Payment Arrangement, Expense								14,550		$ 133,650	16,916	$ 35,012
CEO/CFO [Member]
Stock Issued During Period, Shares, Issued for Services (in shares)		46,961
Stock Issued During Period, Value, Issued for Services			$ 82,180
Share-Based Payment Arrangement, Expense								$ 54,688			$ 328,126
Deferred Compensation Arrangement with Individual, Shares Subject to Repurchase (in shares)								125,000			125,000
Chief Executive Officer [Member]
Deferred Compensation Arrangement with Individual, Shares Issued (in shares)				250,000
Share-Based Payment Arrangement, Expense				$ 437,500
Chief Financial Officer [Member]
Deferred Compensation Arrangement with Individual, Shares Issued (in shares)		125,000
Share-Based Payment Arrangement, Expense				$ 218,750							$ 218,750
Chief Operating Officer [Member]
Deferred Compensation Arrangement with Individual, Shares Issued (in shares)		13,889
Share-Based Payment Arrangement, Expense								$ 25,000
Deferred Compensation Arrangement with Individual, Fair Value of Shares Issued		$ 25,000
ShipTime Acquisition [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)											5,918
Conversion of Series A Preferred Stock to Common Stock [Member]
Conversion of Stock, Shares Converted (in shares)							1,015,851
Conversion of Stock, Shares Issued (in shares)							1,015,851
Additional Conversion of Series A Preferred Stock to Common Stock [Member]
Conversion of Stock, Shares Issued (in shares)							2,089,298
Series A Preferred Stock [Member]
Preferred Stock, Shares Authorized (in shares)								5,000,000			5,000,000			5,000,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share)								$ 0.001			$ 0.001			$ 0.001
Preferred Stock, Shares Issued, Total (in shares)								0			0			0			5,000,000
Percentages of Payment Obligation									1.50%
Preferred Stock, Liquidation Preference Per Share (in dollars per share)									$ 3.03
Preferred Stock, Shares Outstanding, Ending Balance (in shares)								0	0		0			0
ShipTime Canada Stock [Member]
Conversion of Stock, Shares, Convertible (in shares)						1
Common Stock Shares Exchanged (in shares)													500
PAID Preferred Stock [Member]
Conversion of Stock, Shares Issuable (in shares)					45
PAID Common Stock [Member]
Conversion of Stock, Shares Issuable (in shares)					311		356
Common Stock Exercised Shares (in shares)													1,461,078
Common Stock, Capital Shares Reserved for Future Issuance (in shares)								2,106,808			2,106,808
PAID Series A Preferred Stock [Member]
Preferred Stock Exercised Shares (in shares)													1,461,078