Note 4 - Property, Plant and Improvements, Net (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Proceeds from Sale of Property, Plant, and Equipment, Total		$ 1,801	$ 0	$ 1,801
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	$ (0)	(135,600)	(0)	(135,600)
Depreciation, Total	$ 10,968	$ 1,532	$ 10,968	$ 10,724