Stock-Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Summary of stock-based compensation expense
Total stock based compensation expense	$ 56	$ 174	$ 170	$ 772
Remaining unrecognized expense of stock-based compensation	173		173
Product Research and Development [Member]
Summary of stock-based compensation expense
Total stock based compensation expense	(3)	99	40	322
Sales and Marketing [Member]
Summary of stock-based compensation expense
Total stock based compensation expense	51	66	113	172
General and Administrative [Member]
Summary of stock-based compensation expense
Total stock based compensation expense	$ 8	$ 9	$ 17	$ 278