Stock-Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Summary of stock-based compensation expense
Total stock-based compensation expense	$ 19	$ 56	$ 39	$ 170
Remaining unrecognized expense, Stock-based compensation	45		45
Product research and development [Member]
Summary of stock-based compensation expense
Total stock-based compensation expense		(3)		40
Sales and marketing [Member]
Summary of stock-based compensation expense
Total stock-based compensation expense	14	51	28	113
General and administrative [Member]
Summary of stock-based compensation expense
Total stock-based compensation expense	$ 5	$ 8	$ 11	$ 17