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 9 Months Ended 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Mar. 31, 2018
Accounts Receivable | Customer A          
Concentration Risk [Line Items]          
Concentrations of credit risk     36.20%   28.30%
Sales | Customer A          
Concentration Risk [Line Items]          
Concentrations of credit risk 28.80% 23.70% 31.10% 23.30%  
Sales | Customer B          
Concentration Risk [Line Items]          
Concentrations of credit risk   17.70%   18.00%  
Sales | Carrier Partner A          
Concentration Risk [Line Items]          
Concentrations of credit risk 43.70% 49.30% 47.60% 52.80%  
Sales | Carrier Partner B          
Concentration Risk [Line Items]          
Concentrations of credit risk 38.50% 40.00% 38.40% 32.40%