Other Current Assets (Tables)

9 Months Ended

Sep. 30, 2018

Other Current Assets Disclosure [Abstract]

Schedule of Other Current Assets [Table Text Block]

	As of September 30, 2018		As of December 31, 2017
Sales and use taxes	$	257	$	174
Prepaid expenses	230		196
Other	170		163
Other current assets	$	657	$	533