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Note 2 - Summary of Significant Accounting Policies - Property, Plant, and Equipment, Useful Life (Details)	12 Months Ended
	Dec. 31, 2021
Minimum [Member] \| Intellectual Property [Member]
Property, Plant and Equipment, Useful Life (Year)	9 years
Maximum [Member] \| Intellectual Property [Member]
Property, Plant and Equipment, Useful Life (Year)	15 years
Building [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	25 years
Building [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	30 years
Machinery and Equipment [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Machinery and Equipment [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	15 years
Project Life [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Project Life [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	5 years
Light Machinery [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	5 years
Light Machinery [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	10 years
Heavy Equipment [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	10 years
Heavy Equipment [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	15 years
Furniture and Fixtures [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	5 years
Furniture and Fixtures [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	8 years
Leasehold Improvements [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	5 years
Leasehold Improvements [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	8 years
Furniture and Equipment At Customer Locations [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	1 year
Furniture and Equipment At Customer Locations [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years