Note 3 - Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Property and equipment, gross	$ 58,162	$ 60,247
Accumulated depreciation	(45,956)	(44,074)
Property and equipment, net	12,206	16,173
Vehicles [Member]
Property and equipment, gross	53,313	54,670
Property, Plant and Equipment, Other Types [Member]
Property and equipment, gross	2,059	2,059
Building and Building Improvements [Member]
Property and equipment, gross	2,600	3,140
Land [Member]
Property and equipment, gross	$ 190	$ 378

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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