Business Concentrations (Details) - item	3 Months Ended		6 Months Ended	9 Months Ended		12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Mar. 31, 2019
Concentration Risk [Line Items]
Number of carriers			2
Domestic Sales [Member] | Sales Revenue, Services, Net [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Number of carriers	1	1		1	1
Concentration risk, percentage		21.00%			28.00%
Domestic Sales [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Number of carriers				1		1
Concentration risk, percentage						31.00%
Reseller [Member] | Sales Revenue, Services, Net [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Number of resellers	1			1
Reseller [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Number of resellers				1
Domestic Carrier And Reseller [Member] | Sales Revenue, Services, Net [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration risk, percentage				23.00%
Domestic Carrier And Reseller [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration risk, percentage				87.00%