Property and Equipment and Assets Held For Sale (Tables)

6 Months Ended

Jun. 30, 2017

Property, Plant and Equipment [Abstract]

Schedule of property and equipment

Property and equipment are stated at cost and depreciated using the straight-line method over the estimated useful lives of the related assets and consist of the following (in thousands):

	June 30, 2017			December 31, 2016
Equipment (useful life 3 to 15 years)	$	1,755		$	2,231
Tooling (useful life 2 to 5 years)	371			863
Vehicles (useful life 5 years)	86			39
Furniture and fixtures (useful life 5 years)	137			170
Computer software (useful life 3 years)	977			977
Leasehold improvements (the shorter of useful life or lease life)	201			256
Projects in progress	75			154
Property and equipment at cost	3,602			4,690
Less: accumulated depreciation	(2,095		)	(2,365		)
Property and equipment, net	$	1,507		$	2,325