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Concentration Risk (Tables)

3 Months Ended

Mar. 31, 2012


	Three-Month Period Ended March 31, 2012			Three-Month Period Ended March 31, 2011
Quantitative radio audience ratings service and related software licensing revenue		96	%		96	%

Tabular disclosure of the nature of a concentration, a benchmark to which it is compared, and the percentage that the risk is to the benchmark.