Assets Acquisition - Consideration Paid (Details) - EH Trucking $ in Thousands	May 06, 2019 USD ($)
Consideration:
Payments for asset acquisitions, cash	$ 5,624
Value of AE common shares issued	392
Contingent consideration arrangement	431
Fair value of total consideration transferred	6,447
Recognized amounts of identifiable assets acquired:
Property and equipment — tractors and trailers	4,576
Shop, office and telecommunication equipment	20
Intangible assets — customer relationships	1,851
Total purchase price	$ 6,447