Prepaid Tires, Property, Equipment and Depreciation (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($)
Property, Plant and Equipment [Line Items]
Amortization Period of Tires	2 years
Tractors [Member]
Property, Plant and Equipment [Line Items]
Property, Plant, and Equipment, Salvage Value	$ 15
Trailers [Member]
Property, Plant and Equipment [Line Items]
Property, Plant, and Equipment, Salvage Value	$ 4