Assets Acquisition - Consideration Paid (Details) - EH Trucking $ in Thousands	May 06, 2019 USD ($)
Consideration:
Payments for asset acquisitions, cash	$ 5,611
Value of AE common shares issued	392
Contingent consideration arrangement	431
Fair value of total consideration transferred	6,434
Recognized amounts of identifiable assets acquired:
Property and equipment — tractors and trailers	4,408
Shop, office and telecommunication equipment	19
Intangible assets — customer relationships	2,007
Total purchase price	$ 6,434