Concentration Risk (Tables)

6 Months Ended

Jun. 30, 2012

Quantitative Radio Audience Ratings Service And Related Software Licensing Revenue Accounted Aggregate Percentages Of Total Company Revenue

The Company’s quantitative radio audience ratings service and related software licensing revenue accounted for the following percentages, in the aggregate, of total Company revenue:

	Three- Month Period Ended June 30, 2012			Three- Month Period Ended June 30, 2011			Six-Month Period Ended June 30, 2012			Six-Month Period Ended June 30, 2011
Quantitative radio audience ratings service and related software licensing revenue		82	%		81	%		89	%		89	%