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Note 10 - Segment Reporting (Details Textual)	3 Months Ended				6 Months Ended
	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Number of Operating Segments					3
Increase (Decrease) in Revenue	$ (624,920)				$ (6,908,887)
Increase (Decrease) in Revenue, Percentage	(13.00%)
Net Income (Loss) Attributable to Parent, Total	$ (3,098,108)	$ (2,459,429)	$ (2,563,811)	$ 303,499	(5,557,537)	$ (2,260,312)
Assets, Total	51,404,432		51,404,432		51,404,432	51,404,432	$ 42,210,137
Water Segment [Member]
Increase (Decrease) in Revenue	(1,243,036)				(7,997,503)
Net Income (Loss) Attributable to Parent, Total	(944,122)		(506,209)		(1,580,562)	110,758
Assets, Total	12,166,764				12,166,764		14,033,107
Ceramics Segment [Member]
Increase (Decrease) in Revenue	488,558
Net Income (Loss) Attributable to Parent, Total	(1,457,862)		$ (874,606)		(1,882,398)	$ (975,701)
Assets, Total	15,747,698				$ 15,747,698		$ 16,734,371
Plastics Segment [Member]
Increase (Decrease) in Revenue	$ 152,468

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