Prepaid Expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Director compensation		$ 215
Director and officer insurance	96	70
Legal retainer	25	25
Rent	25	17
Inventory Purchase Deposits	20
Meetings/Dues	17
Engineering, software licenses and other	9	10
Total prepaid expenses	$ 192	$ 337