Stock-Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Summary of stock-based compensation expense
Total stock based compensation expense	$ 176	$ 179	$ 948	$ 1,594
Remaining unrecognized expense of stock-based compensation	862		862
Product Research and Development [Member]
Summary of stock-based compensation expense
Total stock based compensation expense	100	73	422	433
Sales and Marketing [Member]
Summary of stock-based compensation expense
Total stock based compensation expense	68	51	240	302
General and Administrative [Member]
Summary of stock-based compensation expense
Total stock based compensation expense	$ 8	$ 55	$ 286	$ 859