Quarterly report pursuant to Section 13 or 15(d)

Note 14 - Segments (Details Textual)

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Note 14 - Segments (Details Textual)
 3 Months Ended 9 Months Ended
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Revenues, Total $ 96,382 $ 268,389 $ 481,165 $ 695,762
Number of Primary Types of Products Sold 2   2  
Depreciation, Depletion and Amortization, Nonproduction, Total [1] $ 18,066 $ 15,402 $ 55,672 $ 51,501
Intersegment Eliminations [Member]        
Revenues, Total     $ 0  
[1] Depreciation and amortization are reflected in selling, general and administrative expenses ($18,066 and $15,402 for the three-month periods ended September 30, 2021 and 2020, and $55,672 and $51,501 for the nine-month periods ended September 30, 2021 and 2020, respectively).