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Business Concentrations (Details) - Tier 1 Carrier Partner [Member] - Customer Concentration Risk [Member] - item
3 Months Ended 12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Mar. 31, 2019
Sales Revenue, Services, Net [Member]      
Concentration Risk [Line Items]      
Number of carriers 2 1  
Concentration risk, percentage 89.00% 33.00%  
Accounts Receivable [Member]      
Concentration Risk [Line Items]      
Number of carriers 2   1
Concentration risk, percentage 78.00%   31.00%