Note 2 - New Accounting Pronouncements - ROU Assets Useful Life (Details)	3 Months Ended
	Mar. 31, 2019
Automobiles [Member]
Property, plant, and equipment estimated useful lives (Year)	5 years
Building [Member]
Property, plant, and equipment estimated useful lives (Year)	15 years
Minimum [Member] | Land [Member]
Property, plant, and equipment estimated useful lives (Year)	1 year
Maximum [Member] | Land [Member]
Property, plant, and equipment estimated useful lives (Year)	35 years