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Note 5 - Goodwill and Other Intangible Assets, Net (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Mar. 01, 2021
Goodwill, Period Increase (Decrease), Total	$ 1,200,000
Goodwill, Ending Balance	15,612,954		$ 14,404,618
Amortization of Intangible Assets	$ 319,230	$ 205,924
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	1 year
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	15 years
Reverso Pumps and Separ America [Member]
Goodwill, Acquired During Period	$ 1,400,000
Acquisition of Global Tek Manufacturing LLC [Member]
Goodwill, Ending Balance				$ 1,896,607
Goodwill, Purchase Accounting Adjustments	$ (200,000)