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Description of the Business (Narrative) (Details)
 9 Months Ended
Dec. 31, 2014
Description Of Business Narrative Details  
Approximate number of business customers 41,100EGHT_ApproximateNumberOfBusinessCustomers
Year Founded 1987
Entity Incorporation, Date of Incorporation Dec. 31, 1996
Entity Incorporation, State Country Name Delaware
Fiscal Year End Date --03-31