Property and Equipment (Tables)

3 Months Ended

Mar. 31, 2019

Property, Plant and Equipment [Abstract]

Schedule of property and equipment

Property and equipment, net consist of the following:

		March 31,			December 31,
	Useful Life	2019			2018
Research and development equipment	5 years	$	1,554		$	1,552
Office and computer equipment	3 years		751			742
Autos	5 years		54			54
Furniture and fixtures	7 years		37			37
Leasehold improvements	*		283			283
			2,679			2,668
Less accumulated depreciation and amortization			(1,696	)		(1,585	)
Total		$	983		$	1,083

* Shorter of lease term or estimated useful life