Property and equipment (Tables)

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

Components of property and equipment

Estimated useful lives of our assets are as follows:

	Useful Life	December 31, 2018		December 31, 2017
Furniture and fixtures	10	$	520	$	519
Automobiles and trucks	5	3,548		4,464
Machinery and equipment	10 — 20 years	21,482		22,467
Office and computer equipment	5 — 10 years	6,183		5,046
Building and improvements	10 — 40 years	18,693		19,728
		50,426		52,224
Less accumulated depreciation and amortization		12,449		6,158
		37,977		46,066
Land		5,119		4,575
		$	43,096	$	50,641