Shareholders' Equity (Details 1) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Impact on the results of operations of recording stock-based compensation expense
Total stock-based compensation expense	$ 951	$ 2,178
Per diluted share	$ 0.08	$ 0.21
Cost of revenue - service [Member]
Impact on the results of operations of recording stock-based compensation expense
Total stock-based compensation expense	315	668
Selling, general and administrative [Member]
Impact on the results of operations of recording stock-based compensation expense
Total stock-based compensation expense	521	1,363
Research and development [Member]
Impact on the results of operations of recording stock-based compensation expense
Total stock-based compensation expense	$ 115	$ 147