Property and Equipment (Tables)

3 Months Ended

Mar. 31, 2017

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

Property and equipment, net consist of the following:

		March 31,		December 31,
	Useful Life	2017		2016
Research and development equipment	5 years	$	1,103	$	989
Office and computer equipment	3 years		244		235
Furniture and fixtures	7 years		23		17
Leasehold improvements	*		189		189
			1,559		1,430
Less accumulated depreciation and amortization			857		799
Total		$	702	$	631

* Shorter of lease term or estimated useful life