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Business Segments (Details Textuals)
3 Months Ended 6 Months Ended
Jun. 30, 2012
countries
Jun. 30, 2011
countries
Jun. 30, 2012
countries
Jun. 30, 2011
countries
Segment Reporting [Abstract]        
Number of foreign countries accounting for 10% or more of total revenues 0 0 0 0