Concentration Risk (Tables)

6 Months Ended

Jun. 30, 2013

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 Months Ended June 30, 2013			Three Months Ended June 30, 2012			Six Months Ended June 30, 2013			Six Months Ended June 30, 2012
Quantitative radio audience ratings service and related software licensing revenue		81	%		82	%		88	%		89	%