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Summary of Significant Accounting Policies (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Mar. 31, 2018
Accounts Receivable | Major Advertising Customer A |  |  |
Concentration Risk [Line Items] |  |  |
Concentrations of credit risk, percentage | 33.10% |  |
Accounts Receivable | Customer A |  |  |
Concentration Risk [Line Items] |  |  |
Concentrations of credit risk, percentage |  |  | 28.30%
Sales | Customer A |  |  |
Concentration Risk [Line Items] |  |  |
Concentrations of credit risk, percentage | 29.00% | 20.80% |
Sales | Customer C |  |  |
Concentration Risk [Line Items] |  |  |
Concentrations of credit risk, percentage | 17.50% | 10.80% |
Sales | Carrier Partner A |  |  |
Concentration Risk [Line Items] |  |  |
Concentrations of credit risk, percentage | 50.70% | 55.90% |
Sales | Carrier Partner B |  |  |
Concentration Risk [Line Items] |  |  |
Concentrations of credit risk, percentage | 37.90% | 24.20% |

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