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Note 7 - Concentration of Revenue
3 Months Ended
Mar. 31, 2015
Risks and Uncertainties [Abstract]  
Concentration Risk Disclosure [Text Block]

7.

Concentration of RevenueIn the three month periods ended March 31, 2015 and 2014, the two largest customers in each period represented an aggregate of 45 percent and 40 percent, of consolidated revenue from continuing operations. However, they were not the same two customers in both periods. Most of our customers have multi-year contracts with recurring minimum revenue as well as professional services fees that vary by period depending on their business needs.