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Note 6 - Property and Equipment (Details Textual)	9 Months Ended
Note 6 - Property and Equipment (Details Textual)	Sep. 30, 2018
Land Improvements [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life	10 years
Land Improvements [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life	30 years
Building and Building Improvements [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life	5 years
Building and Building Improvements [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life	50 years
Machinery and Equipment [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life	3 years
Machinery and Equipment [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life	10 years
Vehicles [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life	3 years
Vehicles [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life	10 years
Furniture and Fixtures [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life	3 years
Furniture and Fixtures [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life	10 years