Prepaid expenses

12 Months Ended

Dec. 31, 2016

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Prepaid expenses

4. Prepaid expenses

Prepaid expenses consist of the following:

	December 31,
	2016		2015
Director compensation	$	215	$	6
Director and officer insurance		70		—
Legal retainer		25		—
Rent		17		16
Engineering, software licenses and other		10		14
Total accrued expenses	$	337	$	36