Other Current Assets (Tables)

3 Months Ended

Mar. 31, 2018

Other Current Assets Disclosure [Abstract]

Schedule of Other Current Assets [Table Text Block]

	As of March 31, 2018		As of December 31, 2017
Sales and use taxes	$	293	$	174
Prepaid expenses	218		196
Other	188		163
Other current assets	$	699	$	533