Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Details)

v3.10.0.1
Summary of Significant Accounting Policies (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Mar. 31, 2018
Accounts Receivable | Major Advertising Customer A          
Concentration Risk [Line Items]          
Concentrations of credit risk, percentage     41.40%    
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 39.00% 25.00% 32.70% 22.90%  
Sales | Customer B          
Concentration Risk [Line Items]          
Concentrations of credit risk, percentage   13.00%   15.20%  
Sales | Customer C          
Concentration Risk [Line Items]          
Concentrations of credit risk, percentage   10.10%   10.40%  
Sales | Carrier Partner A          
Concentration Risk [Line Items]          
Concentrations of credit risk, percentage 49.70% 54.20% 50.20% 55.40%  
Sales | Carrier Partner B          
Concentration Risk [Line Items]          
Concentrations of credit risk, percentage 38.80% 29.50% 38.30% 26.80%