Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Components of Intangible Assets

	December 31, 2017						December 31, 2016
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Technology and intellectual property	$	8,092	$	7,735	$	357	$	8,399	$	7,940	$	459
Brands	4,302		1,044		3,258		4,311		921		3,390
Dealer network, customer relationships and other	1,310		933		377		1,356		912		444
Total intangible assets	$	13,704	$	9,712	$	3,992	$	14,066	$	9,773	$	4,293