Shareholders' Equity (Details 1) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Impact on the results of operations of recording stock-based compensation expense
Total stock-based compensation expense	$ (207)	$ 578	$ 686	$ 1,685
Per diluted share	$ (0.02)	$ 0.05	$ 0.06	$ 0.14
Cost of revenue - service [Member]
Impact on the results of operations of recording stock-based compensation expense
Total stock-based compensation expense	34	184	242	560
Selling, general and administrative [Member]
Impact on the results of operations of recording stock-based compensation expense
Total stock-based compensation expense	(267)	346	355	1,000
Research and development [Member]
Impact on the results of operations of recording stock-based compensation expense
Total stock-based compensation expense	$ 26	$ 48	$ 89	$ 125