Note 1 - Significant Accounting Policies (Details Textual)	3 Months Ended
	Mar. 31, 2020
Tractors [Member]
Property, Plant and Equipment, Useful Life (Year)	5 years
Property, Plant and Equipment, Salvage Value, Percentage	15.00%
Refrigerated Trailers [Member]
Property, Plant and Equipment, Useful Life (Year)	7 years
Dry Van Trailers [Member]
Property, Plant and Equipment, Useful Life (Year)	10 years
Property, Plant and Equipment, Salvage Value, Percentage	25.00%