Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Summary of Property and Equipment

The following is a summary of property and equipment and related accumulated depreciation by major classification as of December 31, 2017 and 2016 (in thousands):

	December 31, 2017			December 31, 2016
Office furniture and equipment	$	399		$	333
Leasehold improvements	271			166
Computers and equipment	903			836
Field trailers	10			10
Design center	470			470
	2,053			1,815
Less: accumulated depreciation	(1,249		)	(923		)
Total property and equipment, net	$	804		$	892