Shareholders' Equity (Details 1) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Impact on the results of operations of recording stock-based compensation expense
Total stock-based compensation expense	$ 252	$ 484
Per diluted share	$ 0.02	$ 0.04
Cost of revenue - service [Member]
Impact on the results of operations of recording stock-based compensation expense
Total stock-based compensation expense	73	107
Selling, general and administrative [Member]
Impact on the results of operations of recording stock-based compensation expense
Total stock-based compensation expense	149	344
Research and development [Member]
Impact on the results of operations of recording stock-based compensation expense
Total stock-based compensation expense	$ 30	$ 33