Concentration Of Credit Risk (Details)	3 Months Ended	12 Months Ended	3 Months Ended		12 Months Ended	3 Months Ended			12 Months Ended			3 Months Ended
	Mar. 31, 2013 customer	Dec. 31, 2012 customer	Mar. 31, 2012 One Significant Customer [Member]	Mar. 31, 2013 Two Significant Customers [Member]	Dec. 31, 2012 Three Significant Customers [Member]	Mar. 31, 2013 Europe [Member] One Significant Customer [Member] customer	Mar. 31, 2013 Europe [Member] Two Significant Customers [Member]	Mar. 31, 2013 Russian Federation [Member] One Significant Customer [Member]	Dec. 31, 2012 Commonwealth Of Independent States [Member] Three Significant Customers [Member]	Dec. 31, 2012 Asia [Member] Three Significant Customers [Member]	Dec. 31, 2012 Mexico [Member] Three Significant Customers [Member]	Mar. 31, 2013 Phillipines [Member] Two Significant Customers [Member]
Concentration Risk [Line Items]
Contribution risk percentage threshold				10.00%
Percentage of revenue from continuing operations			24.00%	28.00%			10.00%					18.00%
Percentage of contract receivables and unbilled work-in-progress					46.00%		17.00%	35.00%	21.00%	14.00%	11.00%	18.00%
Number of customers contributing to revenue	2					1
Number of customers accounting for contract receivables and unbilled work-in-progress	2	3