Stockholders' Equity and Employee Stock Option Plans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Stock-based Compensation Expense
Stock-based Compensation Expense, Total	$ 423	$ (161)	$ 1,306	$ 1,222
Cost of product [Member]
Stock-based Compensation Expense
Stock-based Compensation Expense, Total	33	(86)	141	57
Cost of service [Member]
Stock-based Compensation Expense
Stock-based Compensation Expense, Total	4	10	31	25
Product development [Member]
Stock-based Compensation Expense
Stock-based Compensation Expense, Total	(249)	(285)	94	257
Sales and marketing [Member]
Stock-based Compensation Expense
Stock-based Compensation Expense, Total	216	163	305	471
General and administrative [Member]
Stock-based Compensation Expense
Stock-based Compensation Expense, Total	$ 419	$ 37	$ 735	$ 412