Debt Instruments - Capital Lease Agreement (Details) - USD ($)	1 Months Ended
	Dec. 31, 2019	Nov. 30, 2019	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2017	Mar. 31, 2020	Jan. 31, 2020	Aug. 31, 2019	Feb. 28, 2019
Debt Instrument [Line Items]
Capital lease obligations	$ 9,549,000					$ 11,234,000
Capital Lease Obligations
Debt Instrument [Line Items]
Capital lease term				4 years	4 years
Network equipment | Capital Lease Obligations
Debt Instrument [Line Items]
Capital lease, face amount	$ 1,000,000.0	$ 2,200,000	$ 1,300,000	$ 500,000	$ 5,000,000.0	$ 2,300,000	$ 1,000,000.0	$ 1,300,000	$ 2,900,000
Interest rate, stated percentage	5.42%	5.69%		5.38%	5.24%	5.42%		6.33%	5.38%
Capital lease term	3 years	3 years	3 years	3 years